I have a constructor function which registers an event handler: function MyConstructor(data, transport) { this.data = data; transport.on('data', function () { alert(this.data); }); } // Mock transport object var tran...
What's the difference between var A = function () { this.x = function () { //do something }; }; and var A = function () { }; A.prototype.x = function () { //do something };...
In a JavaScript file I saw: function Somefunction(){ var that = this; ... } What is the purpose of declaring that and assigning this this to it?...
I'm creating a component with Vue.js. When I reference this in any of the the lifecycle hooks (created, mounted, updated, etc.) it evaluates to undefined: mounted: () => { console.log(this); // logs "undefined" }, The same t...
I need to access this from my setInterval handler prefs: null, startup : function() { // init prefs ... this.retrieve_rate(); this.intervalID = setInterval(this.retrieve_rate, this.INTERVAL); }, retrieve_ra...
This question already has answers here:...
The problem in example 1 is 'this' referring to the global name instead of the myName object. I understand the use of bind() in setting the value of this to a specific object, so it solves the problem in example 1, but why does this proble...
I followed a tutorial for creating a JavaScript stopwatch and am trying to expand it to work with multiple stopwatches (multiple instances of a class). The problem I have is when I am trying to display the current value while the clock is ticking...
I have a question concerning how the "this" pointer is treated in a nested function scenario. Say I insert this following sample code into a web page. I get an error when I call the nested function "doSomeEffects()". I checked i...
©2020 All rights reserved.