I am having difficulty checking and unchecking checkboxes using d3 selection. The following code doesn't seem to work. I want all check boxes to be checked when 'check' is pressed, and all checkboxes unchecked when 'uncheck' is pressed.
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<button type='button' onclick='checkAll()'>Check</button>
<button type='button' onclick='uncheckAll()'>Uncheck</button>
<script src="http://d3js.org/d3.v2.min.js?2.10.0"></script>
<script>
function checkAll(){
d3.selectAll('input').attr('checked','true');
}
function uncheckAll(){
d3.selectAll('input').attr('checked','false');
}
</script>
</body>
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