Jquery how clean formData object in my own upload plugin - javascript

I tried to create my own plugin for upload files via ajax.
If the page where there is the input file is reloaded after upload It seems to work good.
If the page where there is the input file is NOT reloaded after upload (because was reloaded only ajax content) There are problems with IE and Chrome because the files to upload are appended to previous just uploaded (with firefox is ok).
I tried to fix it by cleaning the input file after the first upload but in this way then with IE and Chrome I can no longer upload other files.
MY FIX
complete: function () {
defaults.onFinish.call(this);
// If page where is the input file not reloaded
// after upload files IE and Chrome not working
$this.replaceWith($this.val('').clone(true));
$this.val('');
}
In truth I would clean the formData object after every upload but I haven't been able to do it
MY PLUGIN
;(function ($, window, document, undefined) {
// Function-level strict mode syntax
'use strict';
$.fn.ajaxUpload = function(options) {
var defaults = {
num_files : 0,
max_files : 2,
max_concurrent : 10,
max_filesize : 1024 * 4096,
php_max_size : 1024 * 8192,
allowed_types : ['jpeg','jpg'],
ajax_url : 'action.php',
var_name : 'file',
extra_fields : {},
onFinish : function() {}
};
var options = $.extend(defaults, options);
return this.each(function() {
var $this = $(this);
$this.on('change', function() {
var files = $this[0].files;
var len = files.length;
var items = 0;
var diff_files = parseInt(defaults.max_files - defaults.num_files - len);
if(diff_files < 0) {
return false;
}
if(!maxUploadFiles(len, defaults.max_concurrent)) {
return false;
}
var formdata = new FormData();
jQuery.each(files, function(i, file) {
if(!isOverSized(file, defaults.max_filesize)) {
return false;
}
if(!isAllowedTypes(file, defaults.allowed_types)) {
return false;
}
if(!totalFilesSize(file, defaults.php_max_size)) {
return false;
}
formdata.append(defaults.var_name + '['+i+']', file);
items++;
});
// Append extra data to formdata
$.each(defaults.extra_fields, function(name, value) {
formdata.append(name, value);
});
// Check that files have passed all test
if (len != items) { return false; }
$.ajax({
url: defaults.ajax_url,
data: formdata,
cache: false,
contentType: false,
processData: false,
type: 'POST',
beforeSend: function () {
},
success: function(data) {
totalSize = 0;
},
complete: function () {
defaults.onFinish.call(this);
// If page where is the input file not reloaded
// after upload files IE and Chrome not working
//$this.replaceWith($this.val('').clone(true));
//$this.val('');
}
});
});
});
};
var totalSize = 0;
function totalFilesSize(file, php_max_size) {
totalSize += file.size;
if(totalSize > php_max_size) {
totalSize = 0;
return false;
}
return true;
}
function maxUploadFiles(len, max_concurrent) {
if(len > max_concurrent) {
return false;
}
return true;
}
function isAllowedTypes(file, allowed_types) {
var ext = file.name.split('.').pop().toLowerCase();
if(jQuery.inArray(ext, allowed_types) < 0) {
return false;
}
return true;
}
function isOverSized(file, max_filesize) {
if(file.size > max_filesize) {
return false;
}
return true;
}
})(jQuery, window, document);
According to you that changes should I do to solve my problem?
Thank you
EDIT
I add this line on complete, and It seems to work
$this.val('');
$this.wrap('<form>').parent('form').trigger('reset');
$this.unwrap();
$this.replaceWith($this.clone());

The problem with your plugin is that you keep a reference to the original input with $this and then tried to replace it with a clone. Because you are cloning is better to get a new reference each time so you should unbind and bind .
(function ($, window, document, undefined) {
// Function-level strict mode syntax
'use strict';
$.fn.ajaxUpload = function (options) {
var defaults = {
num_files: 0,
max_files: 2,
max_concurrent: 10,
max_filesize: 1024 * 4096,
php_max_size: 1024 * 8192,
allowed_types: ['jpeg', 'jpg'],
ajax_url: 'action.php',
var_name: 'file',
extra_fields: {},
onFinish: function () {}
};
var options = $.extend(defaults, options);
var bindInput = function (elem) {
var element = $(elem),
bindFunc = function (evt) {
var files = evt.currentTarget.files;
var len = files.length;
var items = 0;
var diff_files = parseInt(defaults.max_files - defaults.num_files - len);
if (diff_files < 0) {
return false;
}
if (!maxUploadFiles(len, defaults.max_concurrent)) {
return false;
}
var formdata = new FormData();
jQuery.each(files, function (i, file) {
if (!isOverSized(file, defaults.max_filesize)) {
return false;
}
if (!isAllowedTypes(file, defaults.allowed_types)) {
return false;
}
if (!totalFilesSize(file, defaults.php_max_size)) {
return false;
}
formdata.append(defaults.var_name + '[' + i + ']', file);
items++;
});
// Append extra data to formdata
$.each(defaults.extra_fields, function (name, value) {
formdata.append(name, value);
});
// Check that files have passed all test
if (len != items) {
return false;
}
$.ajax({
url: defaults.ajax_url,
data: formdata,
cache: false,
contentType: false,
processData: false,
type: 'POST',
beforeSend: function () {},
success: function (data) {
totalSize = 0;
},
complete: function () {
defaults.onFinish.call(this);
var previous = $(evt.currentTarget);
previous.off('change', bindFunc);
var newElem = previous.val('').clone(true)
previous.replaceWith(newElem);
bindInput(newElem);
}
});
};
element.on('change', bindFunc);
};
return this.each(function () {
bindInput(this)
});
};
var totalSize = 0;
function totalFilesSize(file, php_max_size) {
totalSize += file.size;
if (totalSize > php_max_size) {
totalSize = 0;
return false;
}
return true;
}
function maxUploadFiles(len, max_concurrent) {
if (len > max_concurrent) {
return false;
}
return true;
}
function isAllowedTypes(file, allowed_types) {
var ext = file.name.split('.').pop().toLowerCase();
if (jQuery.inArray(ext, allowed_types) < 0) {
return false;
}
return true;
}
function isOverSized(file, max_filesize) {
if (file.size > max_filesize) {
return false;
}
return true;
}
})(jQuery, window, document);
{Edit}
The problem that originate your question is the nightmare of every file upload plugin developer. As you are developing a plugin you should be aware that the input tag may contain other styles and event handlers set by the consumer of the plugin that you must preserve or you will break existing functionality.
For security reasons the value of the input type file cannot be changed with javascript. There are a lot of answers in SO about that. Search for clear+input+file and see for yourself, the most remarkable is this Clearing <input type='file' /> using jQuery
As you can see there are basically two choices:
Clone the input and call val('') before cloning (calling jQuery $(input).val('') is not the same that calling input.value = '').
The problems of this approach is for example that in IE this event is called twice when clearing the file input and you must be carefull about releasing memory and references to the input being replaced while preserving current styles and event handlers that were not set by your plugin
The second is better but has issues as well. Wrap your input in a form tag and call the form's reset method.
input.wrap('<form>').parent('form').trigger('reset');
input.unwrap();
Check the docs about the sintax of the form tag and you will see the following quote
Note: It's strictly forbidden to nest a form inside another form. Doing so can behave in an unpredictable way that will depend on which browser the user is using.
The main reasoning behind that is that your plugin can be applied to an input tag that is already inside a form leaving you with invalid html so you must wrap the form call the reset method and remove this form right away. Also remember that forms may have visual styles applied to them breaking the user interface if you leave them around.
In the second alternative is easier to fix your code. Just change the complete callback like this. No cloning is needed in this case.
complete: function () {
defaults.onFinish.call(this);
$this.wrap('<form>').parent('form').trigger('reset');
$this.unwrap();
}
This changes should happen so fast that the users will not notice them. I tested with 1000 elements around and no visual glitches were visible.

Related

Dropzone.js when removing a mock file created on page load, the default add files message shows

There is a previous unanswered question about this here but no code or answer was provided. I'm hoping providing some code you'll be able to help me out.
Removing any existing file from Dropzone shows dictDefaultMessage
When I load the page I'm adding mock files to the dropzone. When I click remove on one of those files, the default add image text displays in the dropzone even though there are still files present. How does dropzone keep track of the number of files in the drop zone. I've tried directly modifying the myDropzone.files.length property to match the number of mock files but it breaks the dropzone as I've said in the other question. Here is my code for dropzone.
var jsphotos = '#jsphotos';
var mockFiles = [];
Dropzone.autoDiscover = false;
var fileList = new Array;
var fileListCounter = 0;
var photoDropzone = new Dropzone('#photoDropzone', {
url: 'importphotos.cshtml',
paramName: "file", // The name that will be used to transfer the file
maxFilesize: 5, // MB
method: 'post',
acceptedFiles: 'image/jpeg,image/pjpeg',
dictInvalidFileType: 'Files uploaded must be type .jpg or .jpeg',
init: function () {
this.on("addedfile", function (file) {
// remove size
file.previewElement.querySelector('.dz-size').innerHTML = '';
// add custom button
// Create the remove button
var removeButton = Dropzone.createElement('<i class="fa fa-times-circle-o fa-3x removeButton"></i>');
// Capture the Dropzone instance as closure.
var _this = this;
// Listen to the click event
removeButton.addEventListener("click", function (e) {
// Make sure the button click doesn't submit the form:
e.preventDefault();
e.stopPropagation();
// Remove the file preview.
_this.removeFile(file);
});
// Add the button to the file preview element.
file.previewElement.appendChild(removeButton);
});
this.on("success", function (file, serverFileName) {
file.previewElement.querySelector('.dz-filename').innerHTML = '<span data-dz-name>'+serverFileName+'</span>';
});
this.on("removedfile", function (file) {
//var rmvFile = "";
//for (f = 0; f < fileList.length; f++) {
// if (fileList[f].fileName == file.name) {
// rmvFile = fileList[f].serverFileName;
// fileListCounter--;
// }
//}
//if (rmvFile) {
// $.ajax({
// url: "deletephoto.cshtml",
// type: "POST",
// data: { "fileList": rmvFile }
// });
//}
});
}
});
$('#photoDropzone').sortable({
items: '.dz-preview',
cursor: 'move',
opacity: 0.5,
containment: "parent",
distance: 10,
tolerance: 'pointer',
sort: function (event, ui) {
var $target = $(event.target);
if (!/html|body/i.test($target.offsetParent()[0].tagName)) {
var top = event.pageY - $target.offsetParent().offset().top - (ui.helper.outerHeight(true) / 2);
ui.helper.css({ 'top': top + 'px' });
}
},
update: function (e, ui) {
// do what you want
}
});
if (jsphotos.length > 0) {
var tmpSplit = jsphotos.split(',');
for (i = 0; i < tmpSplit.length; i++) {
if (tmpSplit[i].length > 0) {
mockFiles.push(tmpSplit[i]);
}
}
}
for (i = 0; i < mockFiles.length; i++) {
// Create the mock file:
var mockFile = { name: mockFiles[i]};
// Call the default addedfile event handler
photoDropzone.emit("addedfile", mockFile);
photoDropzone.emit("success", mockFile, mockFile.name);
// And optionally show the thumbnail of the file:
//photoDropzone.emit("thumbnail", mockFile, '#Globals.tempUploadFolderURL' + mockFile.name);
// Or if the file on your server is not yet in the right
// size, you can let Dropzone download and resize it
// callback and crossOrigin are optional.
photoDropzone.createThumbnailFromUrl(mockFile, '#Globals.tempUploadFolderURL' + mockFile.name);
// Make sure that there is no progress bar, etc...
photoDropzone.emit("complete", mockFile);
// If you use the maxFiles option, make sure you adjust it to the
// correct amount:
//var existingFileCount = 1; // The number of files already uploaded
//Dropzone.options.maxFiles = myDropzone.options.maxFiles - existingFileCount;
}
//photoDropzone.files.length = mockFiles.length;
After attempting to code a solution that monitored the count manually and modified the value of the default text, I didn't want a hack to modify class names to 'fool' the dropzone into thinking there were files. So I added this
photoDropzone.files.push(mockFile);
just below
photoDropzone.emit("complete", mockFile);
and now dropzone knows how many files it has, and everything functions appropriately. Files pushed into the array do not get resubmitted, it's the same as adding the mock preview originally.

Enable copy and paste files in dropzone.js

I am using dropzone.js. I want to implement the "Copy & Paste" feature in it.
What I tried is:
Inside dropzone.js:
paste: function(e) {
Dropzone.prototype.emit("paste");
}
Dropzone.prototype.paste = function(e) {
var items, _ref;
if ((e != null ? (_ref = e.clipboardData) != null ? _ref.items : void 0 : void 0) == null) {
return;
}
this.emit("paste", e);
items = e.clipboardData.items;
if (items.length) {
return this._addFilesFromItems(items);
}
};
Page level script:
<script>
var dropZone = Dropzone.forElement('#dropzone1');
dropZone.paste();
</script>
The above is not calling paste:function(e){..}
How to rectify it?
If you don't want to use other JS libraries, you can integrate dropzone with a paste event fairly easily by retrieving the data as a file from the paste event:
// create dropzone however you wish
const myDropzone = new Dropzone("div#element", { url: "/path/to/upload"});
// add paste event listener to the page
document.onpaste = function(event){
const items = (event.clipboardData || event.originalEvent.clipboardData).items;
items.forEach((item) => {
if (item.kind === 'file') {
// adds the file to your dropzone instance
myDropzone.addFile(item.getAsFile())
}
})
}
This worked for me. It uses the FileReaderJS wrapper.
As I am not creating the dropzone programatically, I had to store it at runtime with the init() method.
See here for the FileReaderJS part.
var myDropzone;
function checkUploadFile(filename) {
//do some input checking here, if you want
return true;
}
Dropzone.options.FileDropUploadZone = {
paramName: "myDiv",
maxFilesize: 3, // MB
uploadMultiple: true,
addRemoveLinks: true,
acceptedFiles: 'image/*',
maxFiles: 10,
accept: function(file, done) {
if (!checkUploadFile(file.name)) {
done('Invalid file');
myDropzone.removeFile(file);
}
else { done(); }
},
init: function() {
myDropzone = this;
}
};
$(document).ready(function () {
FileReaderJS.setupClipboard(document.body, {
accept: {
'image/*': 'DataURL'
},
on: {
load: function(e, file) {
myDropzone.addFile(file);
}
}
});
});
var myDropzone = new Dropzone(".dropzone", { });
document.onpaste = function(event){
var items = (event.clipboardData || event.originalEvent.clipboardData).items;
for (index in items) {
var item = items[index];
if (item.kind === 'file') {
// adds the file to your dropzone instance
myDropzone.addFile(item.getAsFile())
}
}
}
Just add this code. Do not declare URL because URL also declared in PHP or coding file, paste this code in view file (HTML, PHP, etc).

selectize.js questions about a no result plugin and allowing default behaviour on link

I am using selectize for an auto suggest field, and i have used one of the no_results plugins to show a link when there is no result, and this works great for the most part, but i have a few dramas i am just not sure how to get around
I have two things i need to get help with
1st most important - How to pass variables to the plugin
I have multiple instances of selectize on the several pages, so i need to pass the vars hr_link and hr_label to the plugin so i don't have to recreate the plugin 30 times with just the those vars different
2nd - Allow link to be clicked, bypassing default behaviour
To get the links to be clickable i have used the onmousedown() and touchstart() but is there a better way to re-enable the default click on just this link in the results box.
I have spent a lot of time researching these items, so I don't think it is a duplicate
// The Plugin
Selectize.define('header_no_results', function( options ) {
var KEY_LEFT = 37;
var KEY_UP = 38;
var KEY_RIGHT = 39;
var KEY_DOWN = 40;
var ignoreKeys = [KEY_LEFT, KEY_UP, KEY_RIGHT, KEY_DOWN];
var self = this;
var hr_link = 'http://link_to_info.com';
var hr_label = 'country';
options = $.extend({
message: ' No results found: click here to add a'+hr_label,
html: function(data) {
return '<div class="selectize-dropdown-content">' + data.message + '</div>';
}
}, options );
self.on('type', function() {
var message = 'Not Found: click here Add a '+hr_label;
if (!self.hasOptions) {
self.$empty_results_container.html(message).show();
} else {
self.$empty_results_container.hide();
}
});
self.onKeyUp = (function() {
var original = self.onKeyUp;
return function ( e ) {
if (ignoreKeys.indexOf(e.keyCode) > -1) return;
self.isOpen = false;
original.apply( self, arguments );
}
})();
self.onBlur = (function () {
var original = self.onBlur;
return function () {
original.apply( self, arguments );
self.$empty_results_container.hide();
};
})();
self.setup = (function() {
var original = self.setup;
return function() {
original.apply( self, arguments);
self.$empty_results_container = $(
options.html($.extend({
classNames: self.$input.attr( 'class' )
}, options))
);
self.$empty_results_container.hide();
self.$dropdown.append(self.$empty_results_container);
};
})();
});
// the function calling the plugin
$('#companyLinks').selectize({
valueField: 'id',
labelField: 'display',
searchField: 'display',
maxItems: 1,
options: [],
create: false,
onItemAdd: function(value){
window.location.href = 'http://my_link.com/'+value;
},
load: function(query, callback) {
if (!query.length) return callback();
$.ajax({
url: 'http://link.com/get/list',
type: 'GET',
dataType: 'json',
data: {
q: query
},
error: function() {
callback();
},
success: function(res) {
callback(res);
//window.open($(res).val(), '_self');
}
});
},
plugins: ['header_no_results']
});
The solution to pass the var was not all that hard after all just had to look in the right place, and there is further info here
In the function we need to change out
plugins: ['header_no_results']
with
plugins: { "header_no_results": {
link : "page/location",
} }
then we can retrieve link and declare the var we needed in the plugin by
var hr_link = options.link;

Error 0x8007000e (NS_ERROR_OUT_OF_MEMORY)

I'm working on an addon to a forum and I get this error:
Error: Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIXPCComponents_Utils.evalInSandbox]
I read that the error means that the script goes into infinite loop until it fills the sandbox.
apparently the js file that leads to this error is script-compiler.js
this is the script:
var ddplus_gmCompiler={
// getUrlContents adapted from Greasemonkey Compiler
// http://www.letitblog.com/code/python/greasemonkey.py.txt
// used under GPL permission
//
// most everything else below based heavily off of Greasemonkey
// http://greasemonkey.mozdev.org/
// used under GPL permission
getUrlContents: function(aUrl){
var ioService=Components.classes["#mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
var scriptableStream=Components
.classes["#mozilla.org/scriptableinputstream;1"]
.getService(Components.interfaces.nsIScriptableInputStream);
var channel=ioService.newChannel(aUrl, null, null);
var input=channel.open();
scriptableStream.init(input);
var str=scriptableStream.read(input.available());
scriptableStream.close();
input.close();
return str;
},
isGreasemonkeyable: function(url) {
var scheme=Components.classes["#mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService)
.extractScheme(url);
return (
(scheme == "http" || scheme == "https" || scheme == "file") &&
!/hiddenWindow\.html$/.test(url)
);
},
contentLoad: function(e) {
var unsafeWin=e.target.defaultView;
if (unsafeWin.wrappedJSObject) unsafeWin=unsafeWin.wrappedJSObject;
var unsafeLoc=new XPCNativeWrapper(unsafeWin, "location").location;
var href=new XPCNativeWrapper(unsafeLoc, "href").href;
if (
ddplus_gmCompiler.isGreasemonkeyable(href)
&& ( /http:\/\/ddunlimited\.net/.test(href) )
&& true
) {
var script=ddplus_gmCompiler.getUrlContents(
'chrome://ddplus/content/ddplus.js'
);
ddplus_gmCompiler.injectScript(script, href, unsafeWin);
}
},
injectScript: function(script, url, unsafeContentWin) {
var sandbox, script, logger, storage, xmlhttpRequester;
var safeWin=new XPCNativeWrapper(unsafeContentWin);
sandbox=new Components.utils.Sandbox(safeWin);
var storage=new ddplus_ScriptStorage();
xmlhttpRequester=new ddplus_xmlhttpRequester(
unsafeContentWin, window//appSvc.hiddenDOMWindow
);
sandbox.window=safeWin;
sandbox.document=sandbox.window.document;
sandbox.unsafeWindow=unsafeContentWin;
// patch missing properties on xpcnw
sandbox.XPathResult=Components.interfaces.nsIDOMXPathResult;
// add our own APIs
sandbox.GM_addStyle=function(css) { ddplus_gmCompiler.addStyle(sandbox.document, css) };
sandbox.GM_setValue=ddplus_gmCompiler.hitch(storage, "setValue");
sandbox.GM_getValue=ddplus_gmCompiler.hitch(storage, "getValue");
// kick : aggiunta la funzione
sandbox.GM_remove=ddplus_gmCompiler.hitch(storage, "remove");
sandbox.GM_openInTab=ddplus_gmCompiler.hitch(this, "openInTab", unsafeContentWin);
sandbox.GM_xmlhttpRequest=ddplus_gmCompiler.hitch(
xmlhttpRequester, "contentStartRequest"
);
//unsupported
sandbox.GM_registerMenuCommand=function(){};
sandbox.GM_log=function(){};
sandbox.GM_getResourceURL=function(){};
sandbox.GM_getResourceText=function(){};
sandbox.__proto__=sandbox.window;
try {
this.evalInSandbox(
"(function(){"+script+"})()",
url,
sandbox);
} catch (e) {
var e2=new Error(typeof e=="string" ? e : e.message);
e2.fileName=script.filename;
e2.lineNumber=0;
//GM_logError(e2);
alert(e2);
}
},
evalInSandbox: function(code, codebase, sandbox) {
if (Components.utils && Components.utils.Sandbox) {
// DP beta+
Components.utils.evalInSandbox(code, sandbox);
} else if (Components.utils && Components.utils.evalInSandbox) {
// DP alphas
Components.utils.evalInSandbox(code, codebase, sandbox);
} else if (Sandbox) {
// 1.0.x
evalInSandbox(code, sandbox, codebase);
} else {
throw new Error("Could not create sandbox.");
}
},
openInTab: function(unsafeContentWin, url) {
var tabBrowser = getBrowser(), browser, isMyWindow = false;
for (var i = 0; browser = tabBrowser.browsers[i]; i++)
if (browser.contentWindow == unsafeContentWin) {
isMyWindow = true;
break;
}
if (!isMyWindow) return;
var loadInBackground, sendReferrer, referrer = null;
loadInBackground = tabBrowser.mPrefs.getBoolPref("browser.tabs.loadInBackground");
sendReferrer = tabBrowser.mPrefs.getIntPref("network.http.sendRefererHeader");
if (sendReferrer) {
var ios = Components.classes["#mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
referrer = ios.newURI(content.document.location.href, null, null);
}
tabBrowser.loadOneTab(url, referrer, null, null, loadInBackground);
},
hitch: function(obj, meth) {
var unsafeTop = new XPCNativeWrapper(unsafeContentWin, "top").top;
for (var i = 0; i < this.browserWindows.length; i++) {
this.browserWindows[i].openInTab(unsafeTop, url);
}
},
apiLeakCheck: function(allowedCaller) {
var stack=Components.stack;
var leaked=false;
do {
if (2==stack.language) {
if ('chrome'!=stack.filename.substr(0, 6) &&
allowedCaller!=stack.filename
) {
leaked=true;
break;
}
}
stack=stack.caller;
} while (stack);
return leaked;
},
hitch: function(obj, meth) {
if (!obj[meth]) {
throw "method '" + meth + "' does not exist on object '" + obj + "'";
}
var hitchCaller=Components.stack.caller.filename;
var staticArgs = Array.prototype.splice.call(arguments, 2, arguments.length);
return function() {
if (ddplus_gmCompiler.apiLeakCheck(hitchCaller)) {
return;
}
// make a copy of staticArgs (don't modify it because it gets reused for
// every invocation).
var args = staticArgs.concat();
// add all the new arguments
for (var i = 0; i < arguments.length; i++) {
args.push(arguments[i]);
}
// invoke the original function with the correct this obj and the combined
// list of static and dynamic arguments.
return obj[meth].apply(obj, args);
};
},
addStyle:function(doc, css) {
var head, style;
head = doc.getElementsByTagName('head')[0];
if (!head) { return; }
style = doc.createElement('style');
style.type = 'text/css';
style.innerHTML = css;
head.appendChild(style);
},
onLoad: function() {
var appcontent=window.document.getElementById("appcontent");
if (appcontent && !appcontent.greased_ddplus_gmCompiler) {
appcontent.greased_ddplus_gmCompiler=true;
appcontent.addEventListener("DOMContentLoaded", ddplus_gmCompiler.contentLoad, false);
}
},
onUnLoad: function() {
//remove now unnecessary listeners
window.removeEventListener('load', ddplus_gmCompiler.onLoad, false);
window.removeEventListener('unload', ddplus_gmCompiler.onUnLoad, false);
window.document.getElementById("appcontent")
.removeEventListener("DOMContentLoaded", ddplus_gmCompiler.contentLoad, false);
},
}; //object ddplus_gmCompiler
function ddplus_ScriptStorage() {
this.prefMan=new ddplus_PrefManager();
}
ddplus_ScriptStorage.prototype.setValue = function(name, val) {
this.prefMan.setValue(name, val);
}
ddplus_ScriptStorage.prototype.getValue = function(name, defVal) {
return this.prefMan.getValue(name, defVal);
}
ddplus_ScriptStorage.prototype.remove = function(name) {
return this.prefMan.remove(name);
}
window.addEventListener('load', ddplus_gmCompiler.onLoad, false);
window.addEventListener('unload', ddplus_gmCompiler.onUnLoad, false);
The user script is massive and available in this gist.
To be able to see the error:
install the addon
go to the message board at http://ddunlimited.net/
open any thread and open click the reply link
The message will appear as soon as the reply page loads.
in practice is a tool created specifically for a forum ... with the functions targeted to simplify the daily actions of the moderator. Now the forum has changed domain and tried to make it compatible with the new forum. I'm editing the js file with a simple text editor. ettengo the error when I edit the script that I posted above. if you do not touch this script ... some functions disappear and are no longer present.
someone can help me? thank you very much: D
OK, reproducible after all. The error in this case has a bogus message, as this isn't actually an OOM condition, but evalInSandbox() receiving a notification from the JS engine that the script was aborted (due to it being unresponsive) and evalInSandbox() not being able to tell the difference.
The reason is an infinite loop in your code at line 425 (cont.):
var max = textArea.parentNode.parentNode.clientHeight;
while (max == textArea.parentNode.parentNode.clientHeight)
textArea.rows++;
This loop whill never abort as the condition will never get false.

submit during beforeunload, maybe who knows radically another method solution

Reviewed many similar questions on stackoverflow.com (also on other resources), but found no answers. So I simplified and generalized questions. It seems like the obvious solution:
$(document).ready(function() {
var a = 3;
var b = 5;
// no message when pressed submit button
$('form').submit(function() {
$(window).off('beforeunload');
});
// confirm of the need to save
$(window).on('beforeunload', function(e) {
if (a != b)
if (confirm('You changed data. Save?')) {
$('form').submit();
// alert('Your data is saved. (With alert submit() work only in FireFox!?)');
}
});
});
But not submit work. If you use the alert(), it works only in FireFox. I would like to correct (possibly without delay) cross-browser solution. Maybe who knows radically another method solution.
P.S. On some originality beforeunload described here in the first part: https://stackoverflow.com/a/6065085/1356425, but this is not the solution obvious functional.
Chrome and Firefox blocking submits after the onbeforeunload-event. You have to use
$(window).on('beforeunload', function(e) {
if (a != b)
return 'You\'ve changed the data. Leave page anyway?';
}
});
I used synchronous AJAX (JAX) request and run handler for events onUnload or onBeforeUnload once for the respective browser. This solution has a single and almost cross-browser behavior.
Example (on jsfiddle):
$(document).ready(function() {
var form = $('form');
var textareas = $('textarea');
function array_compare(a_0, a_1) {
if(a_0.length != a_1.length)
return false;
for(i = 0; i < a_0.length; i++)
if(a_0[i] != a_1[i])
return false;
return true;
}
var flag = false; // flag to control the execution of the unloadHandler() once
var a_open = []; // array with data before unload
$('textarea').each(function(index) {
a_open.push($(this).val());
});
function unloadHandler() {
if (flag)
return;
var a_close = []; // array with data during unload
$('textarea').each(function(index) {
a_close.push($(this).val());
});
if (!array_compare(a_open, a_close)) {
if (confirm('You changed the data, but not saved them. Save?')) {
$.ajax({
type: 'POST',
url: '/echo/json/',
async: false,
data: form.serialize()/* {
json: JSON.stringify({
text: 'My test text.'
}),
delay: 3
} */,
success: function(data) {
if (data) {
console.log(data);
alert('All data is saved!');
}
}
});
}
}
flag = true;
}
// For FireFox, Chrome
$(window).on('beforeunload', function () {
unloadHandler();
});
// For Opera, Konqueror
$(window).unload(function() {
unloadHandler();
});
// Without message when pressed submit button
$('form').submit(function() {
$(window).off('beforeunload');
$(window).off('unload');
});
});
Best way to submit data on unload is to store it in localstorage and send it next time when any other page under same origin is requested.
function sendBeacon(data) {
data?dataArr.push(data):'';
for (var i = 0, len = dataArr.length; i < len; i++) {
$.getScript(dataArr[i], (function (index) {
dataArr.splice(index, 1) //Updata dataArray on data submission
}(i)))
}
}
$(window).on('beforeunload', function () {
localStorage.setItem('dataArr', JSON.stringify(dataArr));
})
var dataArr = JSON.parse(localStorage.getItem('dataArr'));
if (!dataArr) {
dataArr = []; // Create Empty Array
} else {
sendBeacon(dataArr); //Submit stored data
}

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