In Extjs development, we need to block some keyboard keys to avoid problems such as missing input information by users accidentally pressing these shortcut keys during the keyboard operation.
Ext.onReady(function(){ Ext.WindowMgr.zseed = 10000; Ext.QuickTips.init(); Ext.getDoc().on("contextmenu", function(e){ e.stopEvent(); }); if(document.addEventListener){ document.addEventListener("keydown",maskBackspace, true); }else{ document.attachEvent("onkeydown",maskBackspace); } function maskBackspace(event){ var event = event || window.event; //Standardized event object var obj = event.target || event.srcElement; var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode; if(keyCode == 8){ if(obj!=null && obj.tagName!=null && (obj.tagName.toLowerCase() == "input" || obj.tagName.toLowerCase() == "textarea")){ event.returnValue = true; if(Ext.getCmp(obj.id)){ if(Ext.getCmp(obj.id).readOnly) { if(window.event) event.returnValue = false ; //or event.keyCode=0 else event.preventDefault(); //for ff } } }else{ if(window.event) event.returnValue = false ; // or event.keyCode=0 else event.preventDefault(); //for ff } } } var map = new Ext.KeyMap(document, [ { key: [116], // F5 fn: function(){ }, stopEvent: true, scope: this },{ key: [37,39,115], //The arrow keys left and right, F4 alt: true, fn: function(){ }, stopEvent: true, scope: this }, { key: [82], // ctrl + R ctrl: true, fn: function(){ }, stopEvent: true, scope: this }]); map.enable(); });Forbidden to use F5 in IE8, you need to add code:
<body onkeydown="if(event.keyCode==116){event.keyCode=0;return false;}">