Three main options: for (var i = 0; i < xs.length; i++) { console.log(xs[i]); } xs.forEach((x, i) => console.log(x)); for (const x of xs) { console.log(x); } Detailed examples are below. 1. Sequential for loop: Run code snippet Pros Works on every environment You can use break and continue flow control statements Cons Too verbose Imperative Easy to have off-by-one errors (sometimes also … Read more
How do I make the first letter of a string uppercase, but not change the case of any of the other letters? For example: “this is a test” → “This is a test” “the Eiffel Tower” → “The Eiffel Tower” “/index.html” → “/index.html”
Angular version 2+ provides several ways to add classes conditionally: type one type two and multiple option: type three type four
Scoping rules The main difference is scoping rules. Variables declared by var keyword are scoped to the immediate function body (hence the function scope) while let variables are scoped to the immediate enclosing block denoted by { } (hence the block scope).
In my component’s render function I have: everything renders fine, however when clicking the <li> element I receive the following error: Uncaught Error: Invariant Violation: Objects are not valid as a React child (found: object with keys {dispatchConfig, dispatchMarker, nativeEvent, target, currentTarget, type, eventPhase, bubbles, cancelable, timeStamp, defaultPrevented, isTrusted, view, detail, screenX, screenY, clientX, clientY, … Read more
window.location.href is not a method, it’s a property that will tell you the current URL location of the browser. Changing the value of the property will redirect the page. window.open() is a method that you can pass a URL to that you want to open in a new window. For example: window.location.href example: window.open() example: … Read more
Below is my code in aspx page to allow playing audio’s of wav format in the browser but with my current code I am unable to play wav audios in Chrome browser but it works in Firefox. How can I handle this exception?
How do I make the first letter of a string uppercase, but not change the case of any of the other letters? For example: “this is a test” → “This is a test” “the Eiffel Tower” → “The Eiffel Tower” “/index.html” → “/index.html”
In my component’s render function I have: everything renders fine, however when clicking the <li> element I receive the following error: Uncaught Error: Invariant Violation: Objects are not valid as a React child (found: object with keys {dispatchConfig, dispatchMarker, nativeEvent, target, currentTarget, type, eventPhase, bubbles, cancelable, timeStamp, defaultPrevented, isTrusted, view, detail, screenX, screenY, clientX, clientY, … Read more
This is VanillaJS (unmodified): As you can see, it’s not really a framework or a library. It’s just a running gag for framework-loving bosses or people who think you NEED to use a JS framework. It means you just use whatever your (for you own sake: non-legacy) browser gives you (using Vanilla JS when working … Read more