javascript - Javascript：如何在光标的当前位置插入域？(Javascript: how do I insert the domain at the current position of the cursor?)

Question

Can Javascript in the form of a bookmarklet or similar, insert the domain of the current page at the position of the cursor?(可以采用书签或类似形式的Javascript在光标所在的位置插入当前页面的域吗？)

How?(怎么样？) Interested in inserting both stackoverflow.com , www.stackoverflow.com as well as just www .(有兴趣插入stackoverflow.com ， www.stackoverflow.com以及www 。) (Use case: I am writing a question here at SO, the cursor is in either the title text field or the question body text area and I want to insert the domain name at the current position of the cursor).(（用例：我在SO处写一个问题，光标位于标题文本字段或问题正文文本区域中，我想在光标的当前位置插入域名）。)   ask by d-b translate from so

Answer 1

When focusing the textarea, click the bookmarklet, and use document.activeElement to identify the textarea, and .slice its value, concatenating with window.location.origin :(当集中文本区域时，单击小书签，并使用document.activeElement标识文本区域，并对其值进行.slice ，并与window.location.origin串联：)

javascript: (() => { const textarea = document.activeElement; const { selectionStart } = textarea; textarea.value = textarea.value.slice(0, selectionStart) + window.location.origin + textarea.value.slice(selectionStart); })(); If you want the bookmarklet to work for the iframe inside https://robot-parts.confetti.events/ , then access the contentWindow.document to get to the activeElement :(如果您希望小书签在https://robot-parts.confetti.events/的iframe中起作用， https://robot-parts.confetti.events/访问contentWindow.document进入activeElement ：) javascript: (() => { const textarea = document.querySelector('.signup-iframe').contentWindow.document.activeElement; const { selectionStart } = textarea; textarea.value = textarea.value.slice(0, selectionStart) + window.location.origin + textarea.value.slice(selectionStart); })();