console 命令行工具 X clear

console

const arr = [{name:'zhang'},{name:'san'},{name:'li'},{name:'zhang'}];
function merge(arr){
  const jsonArr = arr.map(item=>{
    return JSON.stringify(item)
  })
  return arr.filter(val=>{
    let jsonVal = JSON.stringify(val)
    return jsonArr.indexOf(jsonVal) ==  jsonArr.lastIndexOf(jsonVal)
  })	
}
document.getElementById('app').append(JSON.stringify(merge(arr)))

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Document</title>
</head>
<body>
  <div id="app"></div>
</body>
</html>