给网页所有标签添加outline

自己写的页面使用：

body * {
    outline: 1px solid red
}

自动添加：

方法1:控制台输入：

// https://juejin.im/post/6844903950609547272
var css = document.createElement('style')
css.innerHTML = `* { background-color: rgba(255,0,0,.2); }
* * { background-color: rgba(0,255,0,.2); }
* * * { background-color: rgba(0,0,255,.2); }
* * * * { background-color: rgba(255,0,255,.2); }
* * * * * { background-color: rgba(0,255,255,.2); }
* * * * * * { background-color: rgba(255,255,0,.2); }
* * * * * * * { background-color: rgba(255,0,0,.2); }
* * * * * * * * { background-color: rgba(0,255,0,.2); }
* * * * * * * * * { background-color: rgba(0,0,255,.2); }
* * * * * * * * * * { background-color: rgba(0,0,255,.2); }
`
document.querySelector('head').appendChild(css)

    方法2: chrome书签调试style： 

//方法2：
 
javascript: (function() {
	var elements = document.body.getElementsByTagName('*');
	var items = [];
	for (var i = 0; i < elements.length; i++) {
		if (elements[i].innerHTML.indexOf('* { background:#000!important;color:#0f0!important;outline:solid #f00 1px!important; background-color: rgba(255,0,0,.2) !important; }') != -1) {
			items.push(elements[i]);
		}
	}
	if (items.length > 0) {
		for (var i = 0; i < items.length; i++) {
			items[i].innerHTML = '';
		}
	} else {
		document.body.innerHTML +=
			'<style>* { background:#000!important;color:#0f0!important;outline:solid #f00 1px!important; background-color: rgba(255,0,0,.2) !important; }\
            * * { background-color: rgba(0,255,0,.2) !important; }\
            * * * { background-color: rgba(0,0,255,.2) !important; }\
            * * * * { background-color: rgba(255,0,255,.2) !important; }\
            * * * * * { background-color: rgba(0,255,255,.2) !important; }\
            * * * * * * { background-color: rgba(255,255,0,.2) !important; }\
            * * * * * * * { background-color: rgba(255,0,0,.2) !important; }\
            * * * * * * * * { background-color: rgba(0,255,0,.2) !important; }\
            * * * * * * * * * { background-color: rgba(0,0,255,.2) !important; }</style>';
	}
})();

方法3：同2，只是利用浏览器扩展，将脚本放在脚本管理器的扩展工具中，没有生效

//https://greasyfork.org/zh-CN/scripts/390545-ui-debug-tool

网页所有元素加了outline的效果：