javascript - Searching validityState for values - Stack Overflow

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I may be approaching this the wrong way, but I'm confused how to extract information from an input's validityState object.

var input = document.querySelector('#myinput');
var validity = input.validity;
var keys = Object.keys(validity);

console.log( validity );          // [ object validityState ]
console.log( validity.valid );    // false (this is expected)

console.log( keys )               // empty array
console.log( keys.length )        // 0

<input type="text" id="myinput" required>

I may be approaching this the wrong way, but I'm confused how to extract information from an input's validityState object.

var input = document.querySelector('#myinput');
var validity = input.validity;
var keys = Object.keys(validity);

console.log( validity );          // [ object validityState ]
console.log( validity.valid );    // false (this is expected)

console.log( keys )               // empty array
console.log( keys.length )        // 0

<input type="text" id="myinput" required>

My main question is, how do I find out which property is "failing" if I can't iterate over the validityState object?

Am I missing something?

• javascript
• validation

Share Improve this question Follow asked Oct 25, 2016 at 11:17 evolutionxboxevolutionxbox 4,13266 gold badges3838 silver badges5757 bronze badges

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1 Answer 1

Sorted by: Reset to default 12

Do not use Object.keys(). You can simply iterate on your validity state like this:

var input = document.querySelector('#myinput');
var validity = input.validity;
for(var key in validity){
     console.log(key + ": " + validity[key]);
}

<input type="text" id="myinput" required>

Edit:

• Object.keys() only referring to keys that are in the current Object and does not look in the prototype of this Object. Note that object.hasOwnProperty() does the same test

• in return true if the property is present in the current Object OR if the property is present in the prototype

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