How to check whether a string variable is empty or null in Javascript?

javascript if string empty

// Test whether strValue is empty or is None
if (strValue) {
    //do something
}
// Test wheter strValue is empty, but not None 
if (strValue === "") {
    //do something
}

js if string not empty

if (strValue === "") {
    //...
}

Example 2

function isEmpty(str) {
    return (!str || str.length === 0 );
}

Conclusion

In this page (written and validated by A. Gawali) you learned about . What's Next? If you are interested in completing Javascript tutorial, we encourage you simply to start here: Javascript Tutorial.

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