文档execCommand副本不能与AJAX一起使用

Question

I can't copy the generated link directly (without ctrl+C) I am usign document.execCommand('copy') but it seems it has no effect. If code has no AJAX then its working pefectly . Here's the

• fiddle link with AJAX

• fiddle link without AJAX

HTML :

<div class="permalink-control"> </div>

JQUERY :

    $(".permalink-control")
          .append(
            '<div class="input-group">' +
            '    <span class="input-group-btn"><button type="button" class="btn btn-default" title="Get Permalink"><span class="glyphicon glyphicon-link"></span></button></span>' +
            '    <input type="text" class="form-control">' +
            '</div>'
          );
        $(".permalink-control input")
          .hide()
          .focus(function () {
            // Workaround for broken selection: https://stackoverflow.com/questions/5797539
            var $this = $(this);
            $this.select()
              .mouseup(function () {
                $this.unbind("mouseup");
                return false;
              });
          });
        $(".permalink-control button")
          .click(function () {
            var $this = $(this);
            $.ajax({
              url: "https://api-ssl.bitly.com/shorten",
              dataType: "jsonp",
              data: {
                longUrl: window.location.href,
                access_token: "your access token",
                format: "json"
              },
              success: function (response) {
                var longUrl = Object.keys(response.results)[0];
                var shortUrl = response.results[longUrl].shortUrl;
                if (shortUrl.indexOf(":") === 4) {
                  shortUrl = "https" + shortUrl.substring(4);
                }
                $this.parents(".permalink-control")
                  .find("input")
                  .show()
                  .val(shortUrl)
                  .focus();
              },
              async:false
            });
          });

UPDATE:

How do I copy to the clipboard in JavaScript?

is not answer to my question as My code also copies without using ctrl+C if AJAX is not there. However when I am using AJAX document.execCommand('copy') is not working.

Answer 1

The reason for this is clearly stated in W3 specs :

Copy and cut commands triggered through a scripting API will only affect the contents of the real clipboard if the event is dispatched from an event that is trusted and triggered by the user, or if the implementation is configured to allow this.

But, having said that we can try to fool around the browser by copying text when a user does some interaction .

In this case since you are looking for a click event I assume you're user is interacting with mouse

So, what if I attach a $(window).blur() or $(document).click() event after the ajax call is resolved?

That's right, Since, the user has to blur at some point to use the copy selection, user will initiate a blur() or click() (depending on your need) and we can copy text to our clipboard.

Here's the HACKY DEMO

 $(document).ready(function(){ var shortUrl; $(".permalink-control") .append( '<div class="input-group">' + ' <span class="input-group-btn"><button type="button" class="btn btn-default" title="Get Permalink"><span class="glyphicon glyphicon-link"></span></button></span>' + ' <input type="text" class="form-control">' + '</div>' ); $(".permalink-control input") .hide() .focus(function () { // Workaround for broken selection: http://stackoverflow.com/questions/5797539 var $this = $(this); $this.select(); document.execCommand('copy'); $this.mouseup(function () { $this.unbind("mouseup"); return false; }); }); $(".permalink-control button") .click(function () { var shortUrl =""; var $this = $(this); $.ajax({ url: "https://api-ssl.bitly.com/shorten", dataType: "jsonp", data: { longUrl: window.location.href, access_token: "48ecf90304d70f30729abe82dfea1dd8a11c4584", format: "json" }, success: function (response) { var longUrl = Object.keys(response.results)[0]; shortUrl = response.results[longUrl].shortUrl; if (shortUrl.indexOf(":") === 4) { shortUrl = "https" + shortUrl.substring(4); } $this.parents(".permalink-control") .find("input") .show() .val(shortUrl) .focus(); } }).done(function(){ $(window).blur(function(){ document.execCommand('copy'); $(window).off('blur');// make sure we don't copy anything else from the document when window is foucussed out }); }) }); }) 

 <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="permalink-control"></div> <div class"log"></div> 

PS: This has been tested in chrome.

Answer 2

I had the same problem. I solved it rather primitively: inside the handler of a click event, you can run an interval that will check the variable where ajax will insert the value after the server responds. After the answer is received, we stop the interval and start the work with the clipboard. No problem, because the user himself starts the interval after the click, without any callbacks.

Simple jQuery example:

var ajaxResponse;

function copyText(copiedText){
  $('<textarea class="copied-text">' + copiedText + '</textarea>').appendTo('body');

  if ( navigator.userAgent.match(/ipad|iphone/i) ) {
    var range = document.createRange(),
        textArea = $('.copied-text')[0];
    range.selectNodeContents(textArea);
    var selection = window.getSelection();
    selection.removeAllRanges();
    selection.addRange(range);
    textArea.setSelectionRange(0, 999999);
  } else {
    $('.copied-text').select();
  }

  document.execCommand('copy');
  $('.copied-text').remove();
};

function myAjaxFunc(){
  $.ajax({
    type: 'POST',
    url: yourUrl,
    data: yourData,
    success: function(data){
      ajaxResponse = data;
    }
  });
};

$('.your-button').on('click', function(){
  myAjaxFunc();
  var ajaxCheckTimer = setInterval(function(){
    if ( ajaxResponse ) {
      copyText(ajaxResponse);
      clearInterval(ajaxCheckTimer);
    };
  }, 100);
});

In this example, when clicking on a button, we send some data to the server and start the interval with checking the value of the ajaxResponse variable.

After the response from the server is received, the response of the server is written to this variable, after which the condition in the interval becomes true and the text copy function is called, and the server response variable is specified as the parameter: copyText(ajaxResponse); . The interval stops.

The copyText function creates an textarea on the page with the value of the ajaxResponse variable, copies this value from the field to the clipboard, and deletes the field from the page.

UPDATE 01.07.19

For correct copying to the clipboard on iOS, add the attribute contenteditable with the value true to the text field:

$('<textarea class="copied-text" contenteditable="true">' + copiedText + '</textarea>').appendTo('body');