How to make JavaScript execute after page load?
These solutions will work: or or even Note that the last option is a better way to go since it is unobstrusive and is considered more standard.
javascript
Understanding React-Redux and mapStateToProps()
Q: Is this ok?A: yes Q: Is this expected?Yes, this is expected (if you are using react-redux). Q: Is this an anti-pattern?A: No, this is not an anti-pattern. It’s called “connecting” your component or “making it smart”. It’s by design. It allows you to decouple your component from your state an additional time which increases the modularity of … Read more
How to resolve the C:\fakepath?
Use instead of
What is the convention in JSON for empty vs. null?
It is good programming practice to return an empty array [] if the expected return type is an array. This makes sure that the receiver of the json can treat the value as an array immediately without having to first check for null. It’s the same way with empty objects using open-closed braces {}. Strings, Booleans and integers … Read more
Loop inside React JSX
Think of it like you’re just calling JavaScript functions. You can’t use a for loop where the arguments to a function call would go: See how the function tbody is being passed a for loop as an argument – leading to a syntax error. But you can make an array, and then pass that in as an argument: You can basically … Read more
Get the current URL with JavaScript?
Use: As noted in the comments, the line below works, but it is bugged for Firefox. See URL of type DOMString, readonly.
JavaScript exponents
There is an exponentiation operator, which is part of the ES7 final specification. It is supposed to work in a similar manner with python and matlab: Now it is already implemented in Edge14, Chrome52, and also it is available with traceur or babel.
JavaScript replace/regex
You need to double escape any RegExp characters (once for the slash in the string and once for the regexp): Otherwise, it looks for the end of the line and ‘TESTONE’ (which it never finds). Personally, I’m not a big fan of building regexp’s using strings for this reason. The level of escaping that’s needed … Read more
Does JavaScript pass by reference? [duplicate]
Primitives are passed by value, and Objects are passed by “copy of a reference”. Specifically, when you pass an object (or array) you are (invisibly) passing a reference to that object, and it is possible to modify the contents of that object, but if you attempt to overwrite the reference it will not affect the copy of … Read more
RegEx Ignore Case
Flags go at the end. i is for case-Insensitive (or ignore-case)