I saw somewhere else said,  x && foo();  ?is equal to  if(x){     foo(); }   I tested it and they really did the same thing. But why? What exactly is x && foo()?...
Just started my uni course, struggling a little with javascript. I have been asked to display a square using any character, however, the solution must combine for loops and if statements.   This is what I have so far and I feel pretty close but I jus...
I have 2 different directives. The first one is returns an iframe with a live video, and the second returns an iframe with a recent video.  The condition is: if live content is present, append live directive, else append recent video directive.  Ive...
How do i load my React toolbar component conditionally on state change?  constructor(props) {         super(props);         this.state = {             currentpagenum: 0,         };     }  render(){    return(        <View>            {this.stat...
I'm working on creating a toggle function to 'favorite' an item from a list of many. I've got working script to toggle the item in and out of a user-specific favorites list, communicate that change to a database, and populate the rest...
I have a simple html form that I've added validation to using the JQuery Validation plugin. I have it working for single fields that require a value. I now need to extend that so that if a user answers Yes to a question they must enter something...
I have been using a ternary operator in JavaScript to modify the value of an object based on user input. I have the following code, which runs as it should:  var inputOneAns = inputOne == "Yes" ? "517" : "518";   As you can se...
var a = 1;  function myFunction() {     ++a;     return true; }  // Alert pops up. if (myFunction() && a === 2) {     alert("Hello, world!"); }  // Alert does not pop up. if (a === 3 && myFunction()) {     alert("Hello, un...
I'm trying to check if a form input has any value (doesn't matter what the value is) so that I can append the value to the action URL on submit if it does exist.  I need to add the name of the param before adding the value, and just leaving a...
I'm working with this JS plugin, and I've encountered some syntax I've never seen before. I understand what it's doing, but I'm not sure why it works.  Here's an example of one instance of it:  settings.maxId != null &&...

Tags

Recent Questions

Top Questions

Home Tags Terms of Service Privacy Policy DMCA Contact Us

©2020 All rights reserved.