复制按钮功能

Question

我有这个Bootstrap代码，我想用它来生成地址并实现复制按钮的功能：

<div class="modal fade" id="bitcoinModal" role="dialog">
                    <div class="modal-dialog modal-lg">
                      <div class="modal-content">
                        <div class="container">
                            <div class="offset-top-20 text-md-left">
                              <button type="button" class="close" data-dismiss="modal">&times;</button>
                              <h3>Copy address</h3>
                            </div>
                            <div class="section-60 offset-top-35">

                                <div class="offset-top-20 text-md-center">
                                  <form class="rd-mailform form-inline-custom text-left" data-form-output="form-output-global" data-form-type="subscribe" method="post" action="http://.........">
                                    <div class="form-group form-group-outside">
                                      <div class="input-group">
                                        <label class="form-label form-label-outside text-dark" for="forms-subscribe-email">Bitcoin Address</label>
                                        <input class="form-control" id="forms-subscribe-email" type="text" name="bitcoin_address" value="3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy " data-constraints="@Required"/>
                                      </div>
                                      <div class="input-group-btn">
                                        <button class="btn btn-width-165 btn-primary" type="submit">Copy</button>
                                      </div>
                                    </div>
                                  </form>
                                </div>

                            </div>
                          </div>
                      </div>
                    </div>
                  </div>
              </div>

如何将内容从输入项目复制到剪贴板？如何将文本更改为“已复制”

Answer 1

function copyKey(id) {
            var copyText = document.getElementById(id);
            copyText.select();
            document.execCommand("copy");
        }

        function copyIP() {
            var copyText = document.getElementById('our_ip');

            //create temporary input to copy text as our input is hidden so we need to create another input 
            var tempInput = document.createElement("input");
            tempInput.style = "position: absolute; left: -1000px; top: -1000px";
            tempInput.value = copyText.value;
            document.body.appendChild(tempInput);
            tempInput.select();
            document.execCommand("copy");
            document.body.removeChild(tempInput);

            //show success message
            toastr.info(copyText.value, 'IP Copied to Clipboard');
        }

Answer 2

为此使用execCommand。