something like this:
var $textarea = document.querySelector('-sharpfoo')
document.addEventListener('keydown', function(event){
var needPrevent = true
var tar = event.srcElement || event.target
if(event.keyCode == 8) {
if($textarea == tar) {
needPrevent = false
}
if(needPrevent) {
event.preventDefault();
return false;
}
}
})is very simple, that is, to determine which source node of the trigger event is. I simply use = = to make a reference comparison about the logic of the decision, which can be extended to custom logic.
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