GET data is thrown into page on document load

This question already has an answer here:

How can I get query string values in JavaScript? 73 answers

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如果设置了$_GET['ok'] ，那么您可以使用PHP进行检查，然后将其回显为JavaScript变量：

var ok = <?php echo intval(isset($_GET['ok'])) ?>

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You can use the following which was taken from How to get the value from URL Parameter?

var QueryString = function () {
  // This function is anonymous, is executed immediately and 
  // the return value is assigned to QueryString!
  var query_string = {};
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    // If first entry with this name
    if (typeof query_string[pair[0]] === "undefined") {
      query_string[pair[0]] = pair[1];
      // If second entry with this name
    } else if (typeof query_string[pair[0]] === "string") {
      var arr = [ query_string[pair[0]], pair[1] ];
      query_string[pair[0]] = arr;
        // If third or later entry with this name
    } else {
      query_string[pair[0]].push(pair[1]);
    }
  } 
  return query_string;
} ();

then you can check if $_GET['ok'] is present in url with:

if(query_string.ok !== undefined){
    //$_GET['ok'] is in url
}

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