The mouse’s position is reported on the event object received by a handler for the mousemove event, which you can attach to the window (the event bubbles): (Note that the body of that if will only run on old IE.) Example of the above in action – it draws dots as you drag your mouse over the page. (Tested on IE8, IE11, … Read more
Your regex should be something like [0-9\-\(\)\s]+. It matches numbers, dashes, parentheses and space. If you need something more strict, matching just your example, try this: ([0-9]{10})|(\([0-9]{3}\)\s+[0-9]{3}\-[0-9]{4})
As a recommended alternative to document.write you could use DOM manipulation to directly query and add node elements to the DOM.
Note: you can not close any window that you didn’t opened with window.open. Directly invoking window.close() will ask user with a dialogue box.
You should bind the listener in componentDidMount, that way it’s only created once. You should be able to store the style in state, the listener was probably the cause of performance issues. Something like this:
The problem is that the observable runs in another context, so when you try to create the URL var, you have an empty object and not the blob you want. One of the many ways that exist to solve this is as follows: When the request is ready it will call the function “downloadFile” that … Read more
As mentioned by Quynh Nguyen, you don’t need the ‘.’ in the className. However – document.getElementsByClassName(‘col1’) will return an array of objects. This will return an “undefined” value because an array doesn’t have a class. You’ll still need to loop through the array elements…
There is no semicolon at the end of the first line. So the two lines run together, and it is interpreted as setting the value of funcs to The expression 1, 2 becomes just 2 (comma operator), so you’re trying to access index 2 of an empty array: And undefined has no forEach method. To fix this, always make sure you put a semicolon at … Read more
You have to use bracket notation: The result will be: Maybe instead of an array of objects, you just want one object with two properties: and This will result in x = {left: 0, top: 0}.
This is what you want: You need to escape the \ in your string (turning it into a double-\), otherwise it will become a newline in the JSON source, not the JSON data.