I was able to reproduce this error when I was using webpack to build my javascript with the following chunk in my webpack.config.json: This above configuration tells webpack to not resolve require(‘react’) by loading an npm module, but instead to expect a global variable (i.e. on the window object) called React. The solution is to … Read more
You could just use a case-insensitive regular expression: If you are supposed to be following the instructions in the comments about greater than and less than comparisons, and you want to check that the input is a string of length 1, then: Expand snippet You’ll notice I didn’t use an if statement. That’s because the … Read more
There are several issues: Class names (and IDs) are not allowed to start with a digit. You have to pass a class to getElementsByClassName(). You have to iterate of the result set. Example (untested): Note that getElementsByClassName() is not available up to and including IE8. Update: Alternatively you can give the table an ID and … Read more
For semantics I’d use a <button> element like this: to make the button look like normal text you can use CSS: and for easiness of handing click I’d use jQuery like so: Although if you have an ID attribute on the button you can use plain JS like this:
Like this: Following OP’s comment, test it like this: Will return all anchor tags inside elements with class parent which have an attribute ID specified
The parseInt function converts strings to numbers, and it takes a second argument specifying the base in which the string representation is: See it in action.
You can use Angular $window: Example usage in a contoller:
If you want to perform a hover like event on any HTML element, then you can do it like this. HTML Component You should use both mouseenter and mouseleave events in order to fully implement functional hover events in angular 2.
Absolutely! There is a project called Summer of Goto that allows you use JavaScript at its fullest potential and will revolutionize the way you can write your code. This JavaScript preprocessing tool allows you to create a label and then goto it using this syntax: For example, the example in the question can be written … Read more
Terms like “intensive” or “expensive” are relative and it isn’t always obvious what activities are CPU-intensive. Generally speaking, anything that isn’t I/O is CPU. And I/O is asynchronous in node.js, so not a problem. Therefore, we are left with everything except for I/O being expensive. Your approach to pick general patterns is wise. Sorting, searching, … Read more