javascript - check the checkbox on load but if the page reloads must remember last state -

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I have a group of checkboxes that should be checked when page loads. I have an onload script to check the automatic checkbox, but when I unchecked the checkbox and reloaded the page, it is still checked. How can it remember this in the end? Thanks in advance

try it ... 

  var i , Checkbox = document.querySelectorAll ('input [type = checkbox]'); Function save () {for (i = 0; i & lt; checkbox length; i ++) {localStorage.setItem (checkbox [i] .value, checkbox [i] check); }} Function load_ () {for (i = 0; i & lt; checkbox length; i ++) {checkbox [i]. Checked = localStorage.getItem (checkbox [i] .value) === 'true'? right wrong; }}   
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