How To Add Onchange Function For All Html Form Fields

My HTML Page has 10 Text Fields. Currently no onChange EVENT is available for all ten fields.

Solution 1:

This can be achieved with vanilla JavaScript as zvona suggests.

Here is a simple loop to mock an HTML5 placeholder. <<DEMO>>

var prompt = 'Type something here';

var textFields = document.querySelectorAll('input[name^="text"]');
var index = 0;

for (index = 0; index < textFields.length; ++index) {
    var textField = textFields[index];
    textField.addEventListener('change', onChangeHandler);
    textField.addEventListener('focus', onFocusHandler);
    textField.addEventListener('blur', onBlurHandler);
    textField.value = prompt;
    console.log(textField);
}

functiononChangeHandler() {
    // Do something...
}

functiononFocusHandler() {
    if (this.value === prompt) {
        this.value = '';
    }
}

functiononBlurHandler() {
    if (this.value === '') {
        this.value = prompt;
    }
}

Solution 2:

you can try to give change function to your form using

$('.form :input').change(function(e){
   $('#log').prepend('<p>Form changed ' + $(e.target).attr('id') + '</p>')
});

Demo1

Demo2

Solution 3:

[].forEach.call(document.querySelectorAll("input"), function(input) {
  input.addEventListener("change", fnName, false);
  input.addEventListener("blur", fnName, false);
});

Solution 4:

getElementsByTagname() gets you an array of all input. Interate over them and addEventListener.

Or use jQuery's $('input').on('change'...)

Solution 5:

Try something like:

var inputList = document.getElementsByTagName("input");
for(var i=0;i<inputList.length;i++){
    inputList[i].onchange = function(){
        //function here
    }
    inputList[i].onblur = function(){
        //function here
    }
}

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