javascript - saveTextAsFile is not defined -

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i'm trying save file getting error 'savetextasfile not defined' see below

<script type='text/javascript' src='savetextasfile.js'></script>  <textarea id="inputtexttosave" style="width:512px;height:256px"></textarea>  <table>     <tr>         <td>filename save as:</td>         <td><input id="inputfilenametosaveas"></input></td>         <td><button onclick="savetextasfile()">save text file</button></td>     </tr> </table>

i have function savetextasfile() in file savetextasfile.js in same directory html:

function savetextasfile() {     var texttowrite = document.getelementbyid("inputtexttosave").value;     var textfileasblob = new blob([texttowrite], {type:'text/plain'});     var filenametosaveas = document.getelementbyid("inputfilenametosaveas").value;      var downloadlink = document.createelement("a");     downloadlink.download = filenametosaveas;     downloadlink.innerhtml = "download file";     if (window.webkiturl != null)     {         // chrome allows link clicked         // without adding dom.         downloadlink.href = window.webkiturl.createobjecturl(textfileasblob);     }     else     {         // firefox requires link added dom         // before can clicked.         downloadlink.href = window.url.createobjecturl(textfileasblob);         downloadlink.onclick = destroyclickedelement;         downloadlink.style.display = "none";         document.body.appendchild(downloadlink);     }      downloadlink.click(); }

add slash beginning of script tag src make absolute host, otherwise, if in url "localhost/foo/bar/", browser try load file "localhost/foo/bar/savetextasfile.js", if add slash, try load "localhost/savetextasfile.js"

<script type='text/javascript' src='/savetextasfile.js'></script>

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