The JavaScript exception "repeat count must be non-negative" occurs when the
String.prototype.repeat() method is used with a count
argument that is a negative number....cases js "abc".repeat(-1); // RangeError Valid cases js "abc"...
Learn about the GamepadEvent interface, including its constructor and properties, code examples, specifications, and browser compatibility.... js window.addEventListener("gamepadconnected"...a gamepaddisconnected event. js window.addEventListener("gamepaddisconnected"...
OK, so that's great progress for now. We can now add todo items to our app, and the state of the data is tracked using our service. Next we'll move on to getting our footer functionality working, including the todo counter, and look at conditional rendering, including correctly styling todos when they've been checked. We'll also wire up our "Clear completed" button....js : js import Component from "@glimmer/component";...the content to the following: js import Component from "@glimmer/component";...
In this article, we have covered the fundamental information you need to know about numbers in JavaScript, for now. You'll see numbers used again and again, all the way through your JavaScript learning, so it's a good idea to get this out of the way now. If you are one of those people that doesn't enjoy math, you can take comfort in the fact that this chapter was pretty short....that everything is in order: js const myInt = 5; const myFloat...the below two lines as shown: js typeof myInt; typeof myFloat;...
Learn about the WebGLProgram interface, including code examples, specifications, and browser compatibility.... js const program = gl.createProgram();...draw something to the screen. js // Use the program gl.useProgram(program);...
Learn about the focus event, including its type, syntax, and properties, code examples, specifications, and browser compatibility.... js addEventListener("focus", (event).../> </label> </form> JavaScript js const password = document.qu...
Programming languages are very useful for rapidly completing repetitive tasks, from multiple basic calculations to just about any other situation where you've got a lot of similar items of work to complete. Here we'll look at the loop structures available in JavaScript that handle such needs....that implements this example: js const btn = document.querySelector("button");...actually draws the 100 circles: js for (let i = 0; i < 100; i++)...
Learn how to use Intl.Segmenter for locale-sensitive text segmentation in JavaScript to simplify localization, count words or sentences in different languages, and more....to split by space characters: js const str = "How many words....Intl namespace is as follows: js new Intl.Segmenter(locales, options);...
Using the omnibox API, extensions can customize the suggestions offered in the browser address bar's drop-down when the user enters a keyword....hint on how to use the feature: js browser.omnibox.setDefaultSuggestion({..."hello world" | "path:omnibox.js onInputChanged")`, }); You can...
Learn about the HTMLCanvasElement.toDataURL() method, including its syntax, code examples, specifications, and browser compatibility.... Syntax js toDataURL() toDataURL(type) toDataURL(type...canvas with the following lines: js const canvas = document.getE...