diff --git a/Dockerfile b/Dockerfile
index 1e3a262c..1c72e679 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,4 +16,4 @@ RUN npm install
 COPY . /usr/src/app
 
 # Run the tests and build, to make sure everything is working nicely
-RUN npm run build && npm run webpack && npm run test
+RUN npm run build && npm run test
diff --git a/README.md b/README.md
index 6b9b877c..551a94f4 100644
--- a/README.md
+++ b/README.md
@@ -159,7 +159,7 @@ computational environment for Jupyter, supporting interactive data science and s
 - [**rtty**](https://github.com/zhaojh329/rtty): A reverse proxy WebTTY. It is composed of the client and the server.
 - [**Pisth**](https://github.com/ColdGrub1384/Pisth): An SFTP and SSH client for iOS
 - [**abstruse**](https://github.com/bleenco/abstruse): Abstruse CI is a continuous integration platform based on Node.JS and Docker.
-- [**Microsoft SQL Operations Studio**](https://github.com/Microsoft/sqlopsstudio): A data management tool that enables working with SQL Server, Azure SQL DB and SQL DW from Windows, macOS and Linux
+- [**Azure Data Studio**](https://github.com/Microsoft/azuredatastudio): A data management tool that enables working with SQL Server, Azure SQL DB and SQL DW from Windows, macOS and Linux.
 - [**FreeMAN**](https://github.com/matthew-matvei/freeman): A free, cross-platform file manager for power users
 - [**Fluent Terminal**](https://github.com/felixse/FluentTerminal): A terminal emulator based on UWP and web technologies.
 - [**Hyper**](https://hyper.is): A terminal built on web technologies
@@ -171,6 +171,7 @@ computational environment for Jupyter, supporting interactive data science and s
 - [**SSH Web Client**](https://github.com/roke22/PHP-SSH2-Web-Client): SSH Web Client with PHP.
 - [**Shellvault**](https://www.shellvault.io): The cloud-based SSH terminal you can access from anywhere.
 - [**Juno**](http://junolab.org/): A flexible Julia IDE, based on Atom.
+- [**webssh**](https://github.com/huashengdun/webssh): Web based ssh client.
 
 [And much more...](https://github.com/xtermjs/xterm.js/network/dependents)
 
diff --git a/demo/server.js b/demo/server.js
index 0aa9deef..ebe2f644 100644
--- a/demo/server.js
+++ b/demo/server.js
@@ -58,9 +58,25 @@ app.ws('/terminals/:pid', function (ws, req) {
   console.log('Connected to terminal ' + term.pid);
   ws.send(logs[term.pid]);
 
+  function buffer(socket, timeout) {
+    let s = '';
+    let sender = null;
+    return (data) => {
+      s += data;
+      if (!sender) {
+        sender = setTimeout(() => {
+          socket.send(s);
+          s = '';
+          sender = null;
+        }, timeout);
+      }
+    };
+  }
+  const send = buffer(ws, 5);
+
   term.on('data', function(data) {
     try {
-      ws.send(data);
+      send(data);
     } catch (ex) {
       // The WebSocket is not open, ignore
     }
diff --git a/package.json b/package.json
index b10b6b54..ad763f0b 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,6 @@
     "build": "gulp build",
     "prepublish": "npm run build",
     "coveralls": "nyc report --reporter=text-lcov | coveralls",
-    "webpack": "gulp webpack",
     "watch": "concurrently --kill-others-on-fail --names \"lib,css\" \"tsc -w\" \"gulp watch-css\"",
     "watch-addons": "concurrently --kill-others-on-fail --names \"attach,fit,fullscreen,search,terminado,webLinks,winptyCompat,zmodem\" \"tsc -w -p ./src/addons/attach\" \"tsc -w -p ./src/addons/fit\" \"tsc -w -p ./src/addons/fullscreen\" \"tsc -w -p ./src/addons/search\" \"tsc -w -p ./src/addons/terminado\" \"tsc -w -p ./src/addons/webLinks\" \"tsc -w -p ./src/addons/winptyCompat\" \"tsc -w -p ./src/addons/zmodem\"",
     "layering": "concurrently --kill-others-on-fail --names \"common,core\" \"tsc -p ./src/common\" \"tsc -p ./src/core\""
diff --git a/src/BufferLine.test.ts b/src/BufferLine.test.ts
index 2db69176..b824cc38 100644
--- a/src/BufferLine.test.ts
+++ b/src/BufferLine.test.ts
@@ -133,31 +133,71 @@ describe('BufferLine', function(): void {
     const line3 = line.clone();
     chai.expect(TestBufferLine.prototype.toArray.apply(line3)).eql(line.toArray());
   });
-  it('resize enlarge', function(): void {
-    const line = new TestBufferLine(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)]);
-    chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
-  });
-  it('resize shrink(true)', function(): void {
-    const line = new TestBufferLine(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], true);
-    chai.expect(line.toArray()).eql(Array(5).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
-  });
-  it('resize shrink(false)', function(): void {
-    const line = new TestBufferLine(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    chai.expect(line.toArray()).eql(Array(5).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
-  });
-  it('resize shrink(false) + shrink(false)', function(): void {
-    const line = new TestBufferLine(20, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    chai.expect(line.toArray()).eql(Array(5).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
-  });
-  it('resize shrink(false) + enlarge', function(): void {
-    const line = new TestBufferLine(20, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
-    line.resize(15, [1, 'a', 0, 'a'.charCodeAt(0)]);
-    chai.expect(line.toArray()).eql(Array(15).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+  describe('resize', function(): void {
+    it('enlarge(false)', function(): void {
+      const line = new TestBufferLine(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)]);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('enlarge(true)', function(): void {
+      const line = new TestBufferLine(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], true);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(true) - should apply new size', function(): void {
+      const line = new TestBufferLine(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], true);
+      chai.expect(line.toArray()).eql(Array(5).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(false) - should not apply new size', function(): void {
+      const line = new TestBufferLine(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(false) + shrink(false) - should not apply new size', function(): void {
+      const line = new TestBufferLine(20, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      chai.expect(line.toArray()).eql(Array(20).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(false) + enlarge(false) to smaller than before', function(): void {
+      const line = new TestBufferLine(20, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(15, [1, 'a', 0, 'a'.charCodeAt(0)]);
+      chai.expect(line.toArray()).eql(Array(20).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(false) + enlarge(false) to bigger than before', function(): void {
+      const line = new TestBufferLine(20, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(25, [1, 'a', 0, 'a'.charCodeAt(0)]);
+      chai.expect(line.toArray()).eql(Array(25).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(false) + resize shrink=true should enforce shrinking', function(): void {
+      const line = new TestBufferLine(20, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], true);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('enlarge from 0 length', function(): void {
+      const line = new TestBufferLine(0, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink to 0 length', function(): void {
+      const line = new TestBufferLine(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(0, [1, 'a', 0, 'a'.charCodeAt(0)], true);
+      chai.expect(line.toArray()).eql(Array(0).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
+    it('shrink(false) to 0 and enlarge to different sizes', function(): void {
+      const line = new TestBufferLine(10, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      line.resize(0, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+      line.resize(5, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+      line.resize(7, [1, 'a', 0, 'a'.charCodeAt(0)], false);
+      chai.expect(line.toArray()).eql(Array(10).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+      line.resize(7, [1, 'a', 0, 'a'.charCodeAt(0)], true);
+      chai.expect(line.toArray()).eql(Array(7).fill([1, 'a', 0, 'a'.charCodeAt(0)]));
+    });
   });
 });
diff --git a/src/BufferLine.ts b/src/BufferLine.ts
index 53f5d4d4..f1ea9cf0 100644
--- a/src/BufferLine.ts
+++ b/src/BufferLine.ts
@@ -77,15 +77,15 @@ export class BufferLine implements IBufferLine {
 
   /** resize line to cols filling new cells with fill */
   public resize(cols: number, fillCharData: CharData, shrink: boolean = false): void {
+    while (this._data.length < cols) {
+      this._data.push(fillCharData);
+    }
     if (shrink) {
       while (this._data.length > cols) {
         this._data.pop();
       }
     }
-    while (this._data.length < cols) {
-      this._data.push(fillCharData);
-    }
-    this.length = cols;
+    this.length = this._data.length;
   }
 
   public fill(fillCharData: CharData): void {
@@ -141,11 +141,13 @@ export class BufferLineTypedArray implements IBufferLine {
     if (!fillCharData) {
       fillCharData = [0, NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE];
     }
-    this._data = new Uint32Array(cols * CELL_SIZE);
-    for (let i = 0; i < cols; ++i) {
-      this.set(i, fillCharData);
+    if (cols) {
+      this._data = new Uint32Array(cols * CELL_SIZE);
+      for (let i = 0; i < cols; ++i) {
+        this.set(i, fillCharData);
+      }
     }
-    this.length = cols || 0;
+    this.length = cols;
   }
 
   public get(index: number): CharData {
@@ -212,12 +214,12 @@ export class BufferLineTypedArray implements IBufferLine {
   }
 
   public resize(cols: number, fillCharData: CharData, shrink: boolean = false): void {
-    if (cols === this.length) {
+    if (cols === this.length || (!shrink && cols < this.length)) {
       return;
     }
     if (cols > this.length) {
       const data = new Uint32Array(cols * CELL_SIZE);
-      if (this._data) {
+      if (this.length) {
         if (cols * CELL_SIZE < this._data.length) {
           data.set(this._data.subarray(0, cols * CELL_SIZE));
         } else {
diff --git a/src/InputHandler.test.ts b/src/InputHandler.test.ts
index e4314330..aaaf57c3 100644
--- a/src/InputHandler.test.ts
+++ b/src/InputHandler.test.ts
@@ -438,6 +438,36 @@ describe('InputHandler', () => {
       termNew.buffer.x = 40;
       inputHandlerNew.eraseInDisplay([2]);
       expect(termContent(termNew)).eql(termContent(termOld));
+
+      // reset and add a wrapped line
+      termNew.buffer.y = 0;
+      termNew.buffer.x = 0;
+      inputHandlerNew.parse(Array(termNew.cols + 1).join('a')); // line 0
+      inputHandlerNew.parse(Array(termNew.cols + 10).join('a')); // line 1 and 2
+      for (let i = 3; i < termOld.rows; ++i) inputHandlerNew.parse(Array(termNew.cols + 1).join('a'));
+
+      // params[1] left and above with wrap
+      // confirm precondition that line 2 is wrapped
+      expect(termNew.buffer.lines.get(2).isWrapped).true;
+      termNew.buffer.y = 2;
+      termNew.buffer.x = 40;
+      inputHandlerNew.eraseInDisplay([1]);
+      expect(termNew.buffer.lines.get(2).isWrapped).false;
+
+      // reset and add a wrapped line
+      termNew.buffer.y = 0;
+      termNew.buffer.x = 0;
+      inputHandlerNew.parse(Array(termNew.cols + 1).join('a')); // line 0
+      inputHandlerNew.parse(Array(termNew.cols + 10).join('a')); // line 1 and 2
+      for (let i = 3; i < termOld.rows; ++i) inputHandlerNew.parse(Array(termNew.cols + 1).join('a'));
+
+      // params[1] left and above with wrap
+      // confirm precondition that line 2 is wrapped
+      expect(termNew.buffer.lines.get(2).isWrapped).true;
+      termNew.buffer.y = 1;
+      termNew.buffer.x = 90; // Cursor is beyond last column
+      inputHandlerNew.eraseInDisplay([1]);
+      expect(termNew.buffer.lines.get(2).isWrapped).false;
     });
   });
   it('convertEol setting', function(): void {
diff --git a/src/InputHandler.ts b/src/InputHandler.ts
index ddb20527..091f41cf 100644
--- a/src/InputHandler.ts
+++ b/src/InputHandler.ts
@@ -24,26 +24,6 @@ const GLEVEL: {[key: string]: number} = {'(': 0, ')': 1, '*': 2, '+': 3, '-': 1,
  * DCS subparser implementations
  */
 
- /**
-  * DCS + q Pt ST (xterm)
-  *   Request Terminfo String
-  *   not supported
-  */
-class RequestTerminfo implements IDcsHandler {
-  private _data: string;
-  constructor(private _terminal: any) { }
-  hook(collect: string, params: number[], flag: number): void {
-    this._data = '';
-  }
-  put(data: string, start: number, end: number): void {
-    this._data += data.substring(start, end);
-  }
-  unhook(): void {
-    // invalid: DCS 0 + r Pt ST
-    this._terminal.handler(`${C0.ESC}P0+r${this._data}${C0.ESC}\\`);
-  }
-}
-
 /**
  * DCS $ q Pt ST
  *   DECRQSS (https://vt100.net/docs/vt510-rm/DECRQSS.html)
@@ -86,7 +66,7 @@ class DECRQSS implements IDcsHandler {
       default:
         // invalid: DCS 0 $ r Pt ST (xterm)
         this._terminal.error('Unknown DCS $q %s', this._data);
-        this._terminal.handler(`${C0.ESC}P0$r${this._data}${C0.ESC}\\`);
+        this._terminal.handler(`${C0.ESC}P0$r${C0.ESC}\\`);
     }
   }
 }
@@ -287,7 +267,6 @@ export class InputHandler extends Disposable implements IInputHandler {
      * DCS handler
      */
     this._parser.setDcsHandler('$q', new DECRQSS(this._terminal));
-    this._parser.setDcsHandler('+q', new RequestTerminfo(this._terminal));
   }
 
   public dispose(): void {
@@ -722,12 +701,25 @@ export class InputHandler extends Disposable implements IInputHandler {
    * @param start first cell index to be erased
    * @param end   end - 1 is last erased cell
    */
-  private _eraseInBufferLine(y: number, start: number, end: number): void {
-    this._terminal.buffer.lines.get(this._terminal.buffer.ybase + y).replaceCells(
+  private _eraseInBufferLine(y: number, start: number, end: number, clearWrap: boolean = false): void {
+    const line = this._terminal.buffer.lines.get(this._terminal.buffer.ybase + y);
+    line.replaceCells(
       start,
       end,
       [this._terminal.eraseAttr(), NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE]
     );
+    if (clearWrap) {
+      line.isWrapped = false;
+    }
+  }
+
+  /**
+   * Helper method to reset cells in a terminal row.
+   * The cell gets replaced with the eraseChar of the terminal and the isWrapped property is set to false.
+   * @param y row index
+   */
+  private _resetBufferLine(y: number): void {
+    this._eraseInBufferLine(y, 0, this._terminal.cols, true);
   }
 
   /**
@@ -748,18 +740,23 @@ export class InputHandler extends Disposable implements IInputHandler {
       case 0:
         j = this._terminal.buffer.y;
         this._terminal.updateRange(j);
-        this._eraseInBufferLine(j++, this._terminal.buffer.x, this._terminal.cols);
+        this._eraseInBufferLine(j++, this._terminal.buffer.x, this._terminal.cols, this._terminal.buffer.x === 0);
         for (; j < this._terminal.rows; j++) {
-          this._eraseInBufferLine(j, 0, this._terminal.cols);
+          this._resetBufferLine(j);
         }
         this._terminal.updateRange(j);
         break;
       case 1:
         j = this._terminal.buffer.y;
         this._terminal.updateRange(j);
-        this._eraseInBufferLine(j, 0, this._terminal.buffer.x + 1);
+        // Deleted front part of line and everything before. This line will no longer be wrapped.
+        this._eraseInBufferLine(j, 0, this._terminal.buffer.x + 1, true);
+        if (this._terminal.buffer.x + 1 >= this._terminal.cols) {
+          // Deleted entire previous line. This next line can no longer be wrapped.
+          this._terminal.buffer.lines.get(j + 1).isWrapped = false;
+        }
         while (j--) {
-          this._eraseInBufferLine(j, 0, this._terminal.cols);
+          this._resetBufferLine(j);
         }
         this._terminal.updateRange(0);
         break;
@@ -767,7 +764,7 @@ export class InputHandler extends Disposable implements IInputHandler {
         j = this._terminal.rows;
         this._terminal.updateRange(j - 1);
         while (j--) {
-          this._eraseInBufferLine(j, 0, this._terminal.cols);
+          this._resetBufferLine(j);
         }
         this._terminal.updateRange(0);
         break;
diff --git a/src/Terminal.ts b/src/Terminal.ts
index c995af62..63315008 100644
--- a/src/Terminal.ts
+++ b/src/Terminal.ts
@@ -342,7 +342,7 @@ export class Terminal extends EventEmitter implements ITerminal, IDisposable, II
   }
 
   public get isFocused(): boolean {
-    return document.activeElement === this.textarea;
+    return document.activeElement === this.textarea && document.hasFocus();
   }
 
   /**
@@ -1174,7 +1174,7 @@ export class Terminal extends EventEmitter implements ITerminal, IDisposable, II
    * @param isWrapped Whether the new line is wrapped from the previous line.
    */
   public scroll(isWrapped?: boolean): void {
-    const newLine = this.buffer.getBlankLine(DEFAULT_ATTR, isWrapped);
+    const newLine = this.buffer.getBlankLine(this.eraseAttr(), isWrapped);
     const topRow = this.buffer.ybase + this.buffer.scrollTop;
     const bottomRow = this.buffer.ybase + this.buffer.scrollBottom;
 
diff --git a/src/addons/search/SearchHelper.ts b/src/addons/search/SearchHelper.ts
index f23a8c58..7919932a 100644
--- a/src/addons/search/SearchHelper.ts
+++ b/src/addons/search/SearchHelper.ts
@@ -19,7 +19,7 @@ export class SearchHelper implements ISearchHelper {
   /**
    * Find the next instance of the term, then scroll to and select it. If it
    * doesn't exist, do nothing.
-   * @param term Tne search term.
+   * @param term The search term.
    * @param searchOptions Search options.
    * @return Whether a result was found.
    */
@@ -33,7 +33,9 @@ export class SearchHelper implements ISearchHelper {
     let startRow = this._terminal._core.buffer.ydisp;
     if (this._terminal._core.selectionManager.selectionEnd) {
       // Start from the selection end if there is a selection
-      startRow = this._terminal._core.selectionManager.selectionEnd[1];
+      if (this._terminal.getSelection().length !== 0) {
+        startRow = this._terminal._core.selectionManager.selectionEnd[1];
+      }
     }
 
     // Search from ydisp + 1 to end
@@ -61,7 +63,7 @@ export class SearchHelper implements ISearchHelper {
   /**
    * Find the previous instance of the term, then scroll to and select it. If it
    * doesn't exist, do nothing.
-   * @param term Tne search term.
+   * @param term The search term.
    * @param searchOptions Search options.
    * @return Whether a result was found.
    */
@@ -75,7 +77,9 @@ export class SearchHelper implements ISearchHelper {
     let startRow = this._terminal._core.buffer.ydisp;
     if (this._terminal._core.selectionManager.selectionStart) {
       // Start from the selection end if there is a selection
-      startRow = this._terminal._core.selectionManager.selectionStart[1];
+      if (this._terminal.getSelection().length !== 0) {
+        startRow = this._terminal._core.selectionManager.selectionStart[1];
+      }
     }
 
     // Search from ydisp + 1 to end
@@ -108,7 +112,7 @@ export class SearchHelper implements ISearchHelper {
    */
   private _isWholeWord(searchIndex: number, line: string, term: string): boolean {
     return (((searchIndex === 0) || (nonWordCharacters.indexOf(line[searchIndex - 1]) !== -1)) &&
-         (((searchIndex + term.length) === line.length) || (nonWordCharacters.indexOf(line[searchIndex + term.length]) !== -1)));
+        (((searchIndex + term.length) === line.length) || (nonWordCharacters.indexOf(line[searchIndex + term.length]) !== -1)));
   }
 
   /**
@@ -116,7 +120,7 @@ export class SearchHelper implements ISearchHelper {
    * subsequent terminal lines if the text is wrapped. If the provided line number is part of a wrapped text line that
    * started on an earlier line then it is skipped since it will be properly searched when the terminal line that the
    * text starts on is searched.
-   * @param term Tne search term.
+   * @param term The search term.
    * @param y The line to search.
    * @param searchOptions Search options.
    * @return The search result if it was found.
@@ -191,7 +195,7 @@ export class SearchHelper implements ISearchHelper {
     do {
       const nextLine = this._terminal._core.buffer.lines.get(lineIndex + 1);
       lineWrapsToNext = nextLine ? nextLine.isWrapped : false;
-      lineString += this._terminal._core.buffer.translateBufferLineToString(lineIndex, !lineWrapsToNext && trimRight);
+      lineString += this._terminal._core.buffer.translateBufferLineToString(lineIndex, !lineWrapsToNext && trimRight).substring(0, this._terminal.cols);
       lineIndex++;
     } while (lineWrapsToNext);
 
@@ -205,6 +209,7 @@ export class SearchHelper implements ISearchHelper {
    */
   private _selectResult(result: ISearchResult): boolean {
     if (!result) {
+      this._terminal.clearSelection();
       return false;
     }
     this._terminal._core.selectionManager.setSelection(result.col, result.row, result.term.length);
diff --git a/src/addons/search/search.test.ts b/src/addons/search/search.test.ts
index 1fe18b6a..243e555c 100644
--- a/src/addons/search/search.test.ts
+++ b/src/addons/search/search.test.ts
@@ -81,6 +81,9 @@ describe('search addon', () => {
       expect(hello3).eql(undefined);
       expect(llo).eql(undefined);
       expect(goodbye).eql({col: 0, row: 5, term: 'goodbye'});
+      term.core.resize(9, 5);
+      const hello0Resize = term.searchHelper.findInLine('Hello', 0);
+      expect(hello0Resize).eql({col: 8, row: 0, term: 'Hello'});
     });
     it('should respect search regex', () => {
       search.apply(<any>MockTerminal);
diff --git a/src/addons/search/search.ts b/src/addons/search/search.ts
index 9be0b33b..c274f28a 100644
--- a/src/addons/search/search.ts
+++ b/src/addons/search/search.ts
@@ -10,7 +10,7 @@ import { ISearchAddonTerminal, ISearchOptions } from './Interfaces';
 /**
  * Find the next instance of the term, then scroll to and select it. If it
  * doesn't exist, do nothing.
- * @param term Tne search term.
+ * @param term The search term.
  * @param searchOptions Search options
  * @return Whether a result was found.
  */
@@ -25,7 +25,7 @@ export function findNext(terminal: Terminal, term: string, searchOptions: ISearc
 /**
  * Find the previous instance of the term, then scroll to and select it. If it
  * doesn't exist, do nothing.
- * @param term Tne search term.
+ * @param term The search term.
  * @param searchOptions Search options
  * @return Whether a result was found.
  */
diff --git a/src/renderer/atlas/DynamicCharAtlas.ts b/src/renderer/atlas/DynamicCharAtlas.ts
index e67fe4f0..63336900 100644
--- a/src/renderer/atlas/DynamicCharAtlas.ts
+++ b/src/renderer/atlas/DynamicCharAtlas.ts
@@ -129,12 +129,17 @@ export default class DynamicCharAtlas extends BaseCharAtlas {
       return true;
     }
 
+    // Exit early for uncachable glyphs
+    if (!this._canCache(glyph)) {
+      return false;
+    }
+
     const glyphKey = getGlyphCacheKey(glyph);
     const cacheValue = this._cacheMap.get(glyphKey);
     if (cacheValue !== null && cacheValue !== undefined) {
       this._drawFromCache(ctx, cacheValue, x, y);
       return true;
-    } else if (this._canCache(glyph) && this._drawToCacheCount < FRAME_CACHE_DRAW_LIMIT) {
+    } else if (this._drawToCacheCount < FRAME_CACHE_DRAW_LIMIT) {
       let index;
       if (this._cacheMap.size < this._cacheMap.capacity) {
         index = this._cacheMap.size;
diff --git a/src/renderer/dom/DomRenderer.ts b/src/renderer/dom/DomRenderer.ts
index bd0a6b02..d55d2416 100644
--- a/src/renderer/dom/DomRenderer.ts
+++ b/src/renderer/dom/DomRenderer.ts
@@ -353,7 +353,11 @@ export class DomRenderer extends EventEmitter implements IRenderer {
 
   private _setCellUnderline(x: number, x2: number, y: number, y2: number, cols: number, enabled: boolean): void {
     while (x !== x2 || y !== y2) {
-      const span = <HTMLElement>this._rowElements[y].children[x];
+      const row = this._rowElements[y];
+      if (!row) {
+        return;
+      }
+      const span = <HTMLElement>row.children[x];
       span.style.textDecoration = enabled ? 'underline' : 'none';
       x = (x + 1) % cols;
       if (x === 0) {
diff --git a/src/utils/TestUtils.test.ts b/src/utils/TestUtils.test.ts
index f575855a..353e615f 100644
--- a/src/utils/TestUtils.test.ts
+++ b/src/utils/TestUtils.test.ts
@@ -121,7 +121,7 @@ export class MockTerminal implements ITerminal {
   handler(data: string): void {
     throw new Error('Method not implemented.');
   }
-  on(event: string, callback: () => void): void {
+  on(event: string, callback: (...args: any[]) => void): void {
     throw new Error('Method not implemented.');
   }
   off(type: string, listener: XtermListener): void {
diff --git a/typings/xterm.d.ts b/typings/xterm.d.ts
index f809c2ed..c6b6b1e5 100644
--- a/typings/xterm.d.ts
+++ b/typings/xterm.d.ts
@@ -387,37 +387,37 @@ declare module 'xterm' {
      * @param type The type of the event.
      * @param listener The listener.
      */
-    on(type: 'key', listener: (key?: string, event?: KeyboardEvent) => void): void;
+    on(type: 'key', listener: (key: string, event: KeyboardEvent) => void): void;
     /**
      * Registers an event listener.
      * @param type The type of the event.
      * @param listener The listener.
      */
-    on(type: 'keypress' | 'keydown', listener: (event?: KeyboardEvent) => void): void;
+    on(type: 'keypress' | 'keydown', listener: (event: KeyboardEvent) => void): void;
     /**
      * Registers an event listener.
      * @param type The type of the event.
      * @param listener The listener.
      */
-    on(type: 'refresh', listener: (data?: {start: number, end: number}) => void): void;
+    on(type: 'refresh', listener: (data: {start: number, end: number}) => void): void;
     /**
      * Registers an event listener.
      * @param type The type of the event.
      * @param listener The listener.
      */
-    on(type: 'resize', listener: (data?: {cols: number, rows: number}) => void): void;
+    on(type: 'resize', listener: (data: {cols: number, rows: number}) => void): void;
     /**
      * Registers an event listener.
      * @param type The type of the event.
      * @param listener The listener.
      */
-    on(type: 'scroll', listener: (ydisp?: number) => void): void;
+    on(type: 'scroll', listener: (ydisp: number) => void): void;
     /**
      * Registers an event listener.
      * @param type The type of the event.
      * @param listener The listener.
      */
-    on(type: 'title', listener: (title?: string) => void): void;
+    on(type: 'title', listener: (title: string) => void): void;
     /**
      * Registers an event listener.
      * @param type The type of the event.