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show css style
// ==UserScript==
// @name ShowCssStyle
// @namespace http://tampermonkey.net/
// @version 0.4
// @description show css style
// @author Roastwind
// @match *://*/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
// 创意来源: https://juejin.im/pin/5d80b839e51d456cecc4a8e4
// 按钮id
var _id = 'show-css-style'
// style id
var _style_id = 'add-style'
var _btn_id = 'show-css-btn'
var _outline_css = `html * { outline: 1px solid red }#${_id}{outline: none;}#${_id} * {outline: none;}`
var _text_show = 'show'
var _text_hide = 'hide'
var init = function() {
// 容器
var btnWrap = document.createElement('div')
btnWrap.style.position = 'fixed'
btnWrap.style.zIndex = '99999'
btnWrap.style.width = '42px'
// btnWrap.style.height = '60px'
btnWrap.style.left = '0'
btnWrap.style.top = '200px'
btnWrap.style.display = 'flex'
btnWrap.style.flexDirection = 'column'
btnWrap.setAttribute('id', _id)
// 展示按钮
var btn = document.createElement('btn')
btn.style.width = '40px'
btn.style.height = '20px'
btn.style.lineHeight = '20px'
btn.style.border = '1px solid gray'
btn.style.marginBottom = '10px'
btn.style.borderRadius = '5px'
btn.style.textAlign = 'center'
btn.style.cursor = 'pointer'
btn.style.userSelect = 'none'
btn.style.fontSize = '14px'
btn.innerText = _text_show
btn.setAttribute('id', _btn_id)
btn.addEventListener('click', function() {
if (hasShow()) {
removeCssLine()
setBtnText(_text_show)
}
else {
addCssLine()
setBtnText(_text_hide)
}
})
btnWrap.appendChild(btn)
document.body.appendChild(btnWrap)
}
// 是否已添加
var hasShow = function() {
var btn = document.querySelector(`#${_btn_id}`)
return btn && btn.innerText === _text_hide
}
// 设置按钮文本
var setBtnText = function(text) {
var btn = document.querySelector(`#${_btn_id}`)
if (btn) {
btn.innerText = text
}
}
// 添加样式红线
var addCssLine = function() {
var hasAddStyle = document.querySelector(`#${_style_id}`)
if (hasAddStyle) { return }
var style = document.createElement('style')
style.textContent = _outline_css
style.setAttribute('id', _style_id)
document.body.appendChild(style)
}
// 移除样式红线
var removeCssLine = function() {
var addStyle = document.querySelector(`#${_style_id}`)
if (addStyle) {
addStyle.remove()
}
}
if (window === parent) {
init()
}
})();