diff --git a/docs/api.md b/docs/api.md
index d102ff1ab6..e4650eb68c 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -160,7 +160,7 @@
 - [class: Keyboard](#class-keyboard)
   * [keyboard.down(key[, options])](#keyboarddownkey-options)
   * [keyboard.press(key[, options])](#keyboardpresskey-options)
-  * [keyboard.sendCharacter(char)](#keyboardsendcharacterchar)
+  * [keyboard.sendCharacters(text)](#keyboardsendcharacterstext)
   * [keyboard.type(text[, options])](#keyboardtypetext-options)
   * [keyboard.up(key)](#keyboardupkey)
 - [class: Mouse](#class-mouse)
@@ -1240,7 +1240,7 @@ List of all available devices is available in the source code: [DeviceDescriptor
 #### page.emulateMedia(options)
 - `options` <[Object]>
   - `type` <?[string]> Optional. Changes the CSS media type of the page. The only allowed values are `'screen'`, `'print'` and `null`. Passing `null` disables CSS media emulation.
-  - `colorScheme` <?[string]> Optional. Emulates `'prefers-colors-scheme'` media feature, supported values are `'light'`, `'dark'`, `'no-preference'`.
+  - `colorScheme` <"dark"|"light"|"no-preference"> Optional. Emulates `'prefers-colors-scheme'` media feature, supported values are `'light'`, `'dark'`, `'no-preference'`.
 - returns: <[Promise]>
 
 ```js
@@ -2127,7 +2127,7 @@ function findFocusedNode(node) {
 
 Keyboard provides an api for managing a virtual keyboard. The high level api is [`keyboard.type`](#keyboardtypetext-options), which takes raw characters and generates proper keydown, keypress/input, and keyup events on your page.
 
-For finer control, you can use [`keyboard.down`](#keyboarddownkey-options), [`keyboard.up`](#keyboardupkey), and [`keyboard.sendCharacter`](#keyboardsendcharacterchar) to manually fire events as if they were generated from a real keyboard.
+For finer control, you can use [`keyboard.down`](#keyboarddownkey-options), [`keyboard.up`](#keyboardupkey), and [`keyboard.sendCharacters`](#keyboardsendcharacterstext) to manually fire events as if they were generated from a real keyboard.
 
 An example of holding down `Shift` in order to select and delete some text:
 ```js
@@ -2181,17 +2181,17 @@ If `key` is a single character and no modifier keys besides `Shift` are being he
 
 Shortcut for [`keyboard.down`](#keyboarddownkey-options) and [`keyboard.up`](#keyboardupkey).
 
-#### keyboard.sendCharacter(char)
-- `char` <[string]> Character to send into the page.
+#### keyboard.sendCharacters(text)
+- `text` <[string]> Characters to send into the page.
 - returns: <[Promise]>
 
 Dispatches a `keypress` and `input` event. This does not send a `keydown` or `keyup` event.
 
 ```js
-page.keyboard.sendCharacter('嗨');
+page.keyboard.sendCharacters('嗨');
 ```
 
-> **NOTE** Modifier keys DO NOT effect `keyboard.sendCharacter`. Holding down `Shift` will not type the text in upper case.
+> **NOTE** Modifier keys DO NOT effect `keyboard.sendCharacters`. Holding down `Shift` will not type the text in upper case.
 
 #### keyboard.type(text[, options])
 - `text` <[string]> A text to type into a focused element.
@@ -2240,6 +2240,10 @@ await page.mouse.up();
   - `button` <"left"|"right"|"middle"> Defaults to `left`.
   - `clickCount` <[number]> defaults to 1. See [UIEvent.detail].
   - `delay` <[number]> Time to wait between `mousedown` and `mouseup` in milliseconds. Defaults to 0.
+  - `modifiers` <[Array]<"Alt"|"Control"|"Meta"|"Shift">>
+  - `relativePoint` <[Object]> Optional relative point
+    - `x` <[number]> x coordinate
+    - `y` <[number]> y coordinate
 - returns: <[Promise]>
 
 Shortcut for [`mouse.move`](#mousemovex-y-options), [`mouse.down`](#mousedownoptions) and [`mouse.up`](#mouseupoptions).
@@ -2250,6 +2254,10 @@ Shortcut for [`mouse.move`](#mousemovex-y-options), [`mouse.down`](#mousedownopt
 - `options` <[Object]>
   - `button` <"left"|"right"|"middle"> Defaults to `left`.
   - `delay` <[number]> Time to wait between `mousedown` and `mouseup` in milliseconds. Defaults to 0.
+  - `modifiers` <[Array]<"Alt"|"Control"|"Meta"|"Shift">>
+  - `relativePoint` <[Object]> Optional relative point
+    - `x` <[number]> x coordinate
+    - `y` <[number]> y coordinate
 - returns: <[Promise]>
 
 Shortcut for [`mouse.move`](#mousemovex-y-options), [`mouse.down`](#mousedownoptions), [`mouse.up`](#mouseupoptions), [`mouse.down`](#mousedownoptions) and [`mouse.up`](#mouseupoptions).
@@ -2277,6 +2285,10 @@ Dispatches a `mousemove` event.
 - `options` <[Object]>
   - `button` <"left"|"right"|"middle"> Defaults to `left`.
   - `delay` <[number]> Time to wait between `mousedown` and `mouseup` in milliseconds. Defaults to 0.
+  - `modifiers` <[Array]<"Alt"|"Control"|"Meta"|"Shift">>
+  - `relativePoint` <[Object]> Optional relative point
+    - `x` <[number]> x coordinate
+    - `y` <[number]> y coordinate
 - returns: <[Promise]>
 
 Shortcut for [`mouse.move`](#mousemovex-y-options), [`mouse.down`](#mousedownoptions), [`mouse.up`](#mouseupoptions), [`mouse.down`](#mousedownoptions), [`mouse.up`](#mouseupoptions), [`mouse.down`](#mousedownoptions) and [`mouse.up`](#mouseupoptions).
@@ -3134,10 +3146,12 @@ page.on('request', request => {
 ```
 
 #### interception.disable()
+- returns: <[Promise]>
 
 Disables network request interception.
 
 #### interception.enable()
+- returns: <[Promise]>
 
 Once request interception is enabled, every request will stall unless it's continued, responded or aborted.
 An example of a naïve request interceptor that aborts all image requests:
diff --git a/src/chromium/JSHandle.ts b/src/chromium/JSHandle.ts
index 84e22bd3be..0fbd868522 100644
--- a/src/chromium/JSHandle.ts
+++ b/src/chromium/JSHandle.ts
@@ -326,7 +326,7 @@ export class ElementHandle extends JSHandle {
     if (error)
       throw new Error(error);
     await this.focus();
-    await this._page.keyboard.sendCharacter(value);
+    await this._page.keyboard.sendCharacters(value);
   }
 
   async uploadFile(...filePaths: string[]) {
diff --git a/src/firefox/JSHandle.ts b/src/firefox/JSHandle.ts
index eca0e58100..8b3c87069b 100644
--- a/src/firefox/JSHandle.ts
+++ b/src/firefox/JSHandle.ts
@@ -378,7 +378,7 @@ export class ElementHandle extends JSHandle {
     if (error)
       throw new Error(error);
     await this.focus();
-    await this._frame._page.keyboard.sendCharacter(value);
+    await this._frame._page.keyboard.sendCharacters(value);
   }
 
   async _clickablePoint(): Promise<{ x: number; y: number; }> {
diff --git a/src/input.ts b/src/input.ts
index 3f23766bda..be671fe82f 100644
--- a/src/input.ts
+++ b/src/input.ts
@@ -123,7 +123,7 @@ export class Keyboard {
     await this._raw.keyup(this._pressedModifiers, description.code, description.keyCode, description.key, description.location);
   }
 
-  async sendCharacter(text: string) {
+  async sendCharacters(text: string) {
     await this._raw.sendText(text);
   }
 
@@ -135,7 +135,7 @@ export class Keyboard {
       } else {
         if (delay)
           await new Promise(f => setTimeout(f, delay));
-        await this.sendCharacter(char);
+        await this.sendCharacters(char);
       }
     }
   }
diff --git a/src/types.ts b/src/types.ts
index 5268432c81..c8cc550ab3 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -5,12 +5,12 @@ type Boxed<Args extends any[], Handle> = { [Index in keyof Args]: Args[Index] |
 type PageFunction<Args extends any[], R = any> = string | ((...args: Args) => R | Promise<R>);
 type PageFunctionOn<On, Args extends any[], R = any> = string | ((on: On, ...args: Args) => R | Promise<R>);
 
-export type Evaluate<Handle> = <Args extends any[], R>(fn: PageFunction<Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
-export type EvaluateHandle<Handle> = <Args extends any[]>(fn: PageFunction<Args>, ...args: Boxed<Args, Handle>) => Promise<Handle>;
-export type $Eval<Handle> = <Args extends any[], R>(selector: string, fn: PageFunctionOn<Element, Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
-export type $$Eval<Handle> = <Args extends any[], R>(selector: string, fn: PageFunctionOn<Element[], Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
-export type EvaluateOn<Handle> = <Args extends any[], R>(fn: PageFunctionOn<any, Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
-export type EvaluateHandleOn<Handle> = <Args extends any[]>(fn: PageFunctionOn<any, Args>, ...args: Boxed<Args, Handle>) => Promise<Handle>;
+export type Evaluate<Handle> = <Args extends any[], R>(pageFunction: PageFunction<Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
+export type EvaluateHandle<Handle> = <Args extends any[]>(pageFunction: PageFunction<Args>, ...args: Boxed<Args, Handle>) => Promise<Handle>;
+export type $Eval<Handle> = <Args extends any[], R>(selector: string, pageFunction: PageFunctionOn<Element, Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
+export type $$Eval<Handle> = <Args extends any[], R>(selector: string, pageFunction: PageFunctionOn<Element[], Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
+export type EvaluateOn<Handle> = <Args extends any[], R>(pageFunction: PageFunctionOn<any, Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
+export type EvaluateHandleOn<Handle> = <Args extends any[]>(pageFunction: PageFunctionOn<any, Args>, ...args: Boxed<Args, Handle>) => Promise<Handle>;
 
 export interface EvaluationContext<Handle> {
   evaluate: Evaluate<Handle>;
diff --git a/src/webkit/JSHandle.ts b/src/webkit/JSHandle.ts
index 46e035d84c..3463881ad1 100644
--- a/src/webkit/JSHandle.ts
+++ b/src/webkit/JSHandle.ts
@@ -256,7 +256,7 @@ export class ElementHandle extends JSHandle {
     if (error)
       throw new Error(error);
     await this.focus();
-    await this._page.keyboard.sendCharacter(value);
+    await this._page.keyboard.sendCharacters(value);
   }
 
   async focus() {
diff --git a/test/keyboard.spec.js b/test/keyboard.spec.js
index a6e85fdadc..ee4eab7df5 100644
--- a/test/keyboard.spec.js
+++ b/test/keyboard.spec.js
@@ -76,10 +76,10 @@ module.exports.addTests = function({testRunner, expect, FFOX, CHROME, WEBKIT}) {
     it('should send a character with sendCharacter', async({page, server}) => {
       await page.goto(server.PREFIX + '/input/textarea.html');
       await page.focus('textarea');
-      await page.keyboard.sendCharacter('嗨');
+      await page.keyboard.sendCharacters('嗨');
       expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('嗨');
       await page.evaluate(() => window.addEventListener('keydown', e => e.preventDefault(), true));
-      await page.keyboard.sendCharacter('a');
+      await page.keyboard.sendCharacters('a');
       expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('嗨a');
     });
     it.skip(FFOX)('should report shiftKey', async({page, server}) => {
diff --git a/utils/doclint/check_public_api/JSBuilder.js b/utils/doclint/check_public_api/JSBuilder.js
index 6ecf54d9bf..5f812e6db0 100644
--- a/utils/doclint/check_public_api/JSBuilder.js
+++ b/utils/doclint/check_public_api/JSBuilder.js
@@ -116,7 +116,7 @@ function checkSources(sources) {
     const type = checker.getTypeOfSymbolAtLocation(symbol, symbol.valueDeclaration);
     const name = symbol.getName();
     if (symbol.valueDeclaration.dotDotDotToken) {
-      const innerType = serializeType(type.typeArguments[0], circular);
+      const innerType = serializeType(type.typeArguments ? type.typeArguments[0] : type, circular);
       innerType.name = '...' + innerType.name;
       return Documentation.Member.createProperty('...' + name, innerType);
     }