I have a HTML like this:
<input type="checkbox" name="choice_shrd_with_me" id="choice{{ forloop.counter }}" value="{{ choice.file_name }}" />
I am trying to get only the checked elements in array like this in Javascript:
var choices = [];
for (var i=0;i<document.getElementsByName('choice_shrd_with_me').length;i++){
choices.push(document.getElementsByName("choice_shrd_with_me")[i].value);
}
The above gets all the values whether the checkbox is checked or not. I want to get only the values on which checkbox is checked. How can I do that?
Just filter for the elements which are checked:
var choices = [];
var els = document.getElementsByName('choice_shrd_with_me');
for (var i=0;i<els.length;i++){
if ( els[i].checked ) {
choices.push(els[i].value);
}
}
For IE < 9
function getCheckedByName(name){
var chks = document.getElementsByName(name);
var results = [];
for(var i = 0; i < chks.length; i++){
chks[i].checked ? results.push(chks[i]):"";
}
return results;
}
For Modern Browsers
function getModernCheckedByName(name){
return Array.prototype.slice.call(document.getElementsByName(name)).filter(function(e){
return e.checked;
});
}
Working Example
对于不需要循环的 vanilla js 解决方案,请使用querySelectorAll
const choices = document.querySelectorAll("input[name='choice_shard_with_me']:checked")
Looks the solution is perfect for checkbox
but in any case if decided to change checkbox with radiobox
Simply can get the selected value of radiobox like the following :
var varName = $('input[name="formItemName"]:checked').val(); // To get selected item of your radiobox
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