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Editor to share with you how to solve the js text box set read-only press the back button back page problem, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Js solve text box set read-only and press back key to back the page

The solution is to define a global document.documentElement.onkeydown event to detect the action of the page each time the key is pressed

Document.documentElement.onkeydown = function (evt) {

Var b =! evt, oEvent = evt | | window.event

If (oEvent.keyCode = = 8) {

Var node = b? OEvent.target: oEvent.srcElement

Var reg = / ^ (input | textarea) $/ I, regType = / ^ (text | textarea) $/ I

If (! reg.test (node.nodeName) | |! regType.test (node.type) | | node.readOnly | | node.disabled) {

If (b) {

OEvent.stopPropagation ()

}

Else {

OEvent.cancelBubble = true

OEvent.keyCode = 0

OEvent.returnValue = false

}

}

}

}

When the backspace key is detected, the corresponding operation is judged to deal with the problem of disabling fallback page refresh.

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