在前端开发中，F12审查元素的情况下，大家都可以随机更改一部分页面的代码，注入恶意JS等等，这种情况避免也不难，虽然还能看到一部分H5源码，但是无法修改。
屏蔽F12 审查元素
代码语言：javascript复制<script>
document.onkeydown = function () {
if (window.event && window.event.keyCode == 123) {
alert("F12被禁用");
event.keyCode = 0;
event.returnValue = false;
}
if (window.event && window.event.keyCode == 13) {
window.event.keyCode = 505;
}
if (window.event && window.event.keyCode == 8) {
alert(str "n请使用Del键进行字符的删除操作！");
window.event.returnValue = false;
}
}
</script>屏蔽右键菜单
代码语言：javascript复制<script>
document.oncontextmenu = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
}屏蔽粘贴
代码语言：javascript复制<script>
document.onpaste = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
}
</script>屏蔽复制
代码语言：javascript复制<script>
document.oncopy = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
}
</script>屏蔽剪切
代码语言：javascript复制<script>
document.oncut = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
}屏蔽选中
代码语言：javascript复制<script>
document.onselectstart = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
}
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