assist/back/insert.js

// let tempData = localStorage.getItem('tempData')
// if (tempData) {
//   tempData = JSON.parse(tempData)
// }


function addScr (data) {
  if (!document.body) {
    setTimeout(() => {
      // console.info('尝试重新加载:' + data)
      addScr (data)
    }, 100);
    return
  }
  var script = document.createElement("script");
  script.type = "text/javascript";
  script.charset = "UTF-8";
  script.innerHTML = data;
  document.body.appendChild(script)
}

function loadJS( url, callback ){
  var script = document.createElement('script'),
      fn = callback || function(){};
  script.type = 'text/javascript';
  //IE
  if(script.readyState){
      script.onreadystatechange = function(){
          if( script.readyState == 'loaded' || script.readyState == 'complete' ){
              script.onreadystatechange = null;
              fn();
          }
      };
  }else{
      //其他浏览器
      script.onload = function(){
          fn();
      };
  }
  script.src = url;
  script.onerror = function() {
    console.error(`脚本: ${url} 加载失败，正在重试!`)
    setTimeout(() => {
        loadJS(url, callback)
    }, 1000);
  }
  document.getElementsByTagName('head')[0].appendChild(script);
}

function loadCSS (url) {
  var headObj = document.getElementsByTagName('head')[0];
  var cssObj = document.createElement('link');
  cssObj.rel = 'stylesheet';
  cssObj.href = url;
  headObj.appendChild(cssObj);
}

// 判断是否有永久的加载数据

if (localStorage.getItem('owoLoadData')) {
  const element = JSON.parse(localStorage.getItem('owoLoadData'))
  let urlStr = window.location.href
  if (new RegExp(element.url).test(urlStr)) {
    setTimeout(() => {
      if (element.script) {
        element.script.forEach(element => {
          loadJS(element)
        });
      }
      if (element.style) {
        element.style.forEach(element => {
          loadCSS(element)
        });
      }
      setTimeout(() => {
        if (element.data) addScr(element.data)
      }, 0);
    }, element.delay || 0);
    
  }
} else {
  // 尝试网络加载
  chrome.runtime.sendMessage({name:"getData", url: window.location.href},function(dataTemp){
    // console.log(dataTemp)
    if (!dataTemp) return
    let urlStr = window.location.href
    dataTemp.forEach(element => {
      if (new RegExp(element.url).test(urlStr)) {
        setTimeout(() => {
          if (element.script) {
            JSON.parse(element.script).forEach(element => {
              loadJS(element)
            });
          }
          if (element.style) {
            JSON.parse(element.style).forEach(element => {
              loadCSS(element)
            });
          }
          setTimeout(() => {
            if (element.data) addScr(element.data)
          }, 0);
        }, element.delay || 0);
        
        return
      }
    })
  })
}