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Tag: javascript

How to iterate over a WeakMap?

A JavaScript WeakMap does not allow you to get the key, or the length or size, by design. Is it possible to nevertheless loop over entries in some way ? If not .. how does the Chrome console do this ? Answer Is it possible to nevertheless loop over entries in some way? No, as you say, the contents of

How to pass props to {this.props.children}

I’m trying to find the proper way to define some components which could be used in a generic way: There is a logic going on for rendering between parent and children components of course, you can imagine <select> and <option> as an example of this logic. This is a dummy implementation for th…

How prevent whitespace in input field with plain javascript

I have an username input field and trying to prevent user fill them with white spaces. i do this and whitespace isn’t blocked Answer Use event.preventDefault to prevent its default behavior. If you want to use the return false;, then you should use the onkeypress of the input instead, jsfiddle

Third party survey onto popup div

I am trying to load a third party survey onto a popup and it’s not working. Where am I making a mistake? This should happen on a click a button or href. So I am creating a iframe dynamically. then loading the data to it.. I am interested in any other ideas to achieve this; I cannot make a ajax