JS how to check empty String and Space

2018-06-09 03:44:17

This question already has an answer here:

How do you check for an empty string in JavaScript? 39 answers

正则表达式可以轻松解决这个问题。

if (/^ *$/.test(value)) {
    //string contains 0+ spaces only
}

I'm not sure I'm understanding correctly. Do you mean like:

if (value == "" || value == " "){
// do anything
}

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