We Keep Coding

Javascript: selenium webdriver isDisplayed() not working

I am writing a test with selenium using JavaScript.
At one point in my test, I iterate through an array of input elements and want to fill in a value for the inputs which are visible.
if (textInputs.length > 0) {
console.log('handling text input');
var i, textInputLen;
for (i = 0, textInputLen = textInputs.length; i < textInputLen; i++) {
(function (index) {
if (textInputs[index].isDisplayed()) {
textInputs[index].sendKeys("custom text box - " + textBoxes);
textBoxes++;
}
}(i))
}
}
I keep getting the following error ElementNotVisibleError: element not visible because it is trying to fill in an input which is not displayed on the DOM. Why is it not working? How can I get it working?
I have tried a few thing instead of isDisplayed():
I executed JS to see if the element had visibility set to hidden or display to none. Issue here is that the element bing displayed, in this case, is due to a slew of things and I am looking for something more general. IN this case, isDisplayed() would be exactly what I want.
Please advise

The method .isDisplayed() returns a promise and not the displayed state. Use then to get the resolved result:
element.isDisplayed().then(function(state){
console.log(state):
});
But a better way would be to filter the list of elements with webdriver.promise.filter:
var textInputs = driver.findElements(By.css("input[type=text]"));
webdriver.promise.filter(textInputs, function(element) {
return element.isDisplayed();
}).then(function(element) {
element.sendKeys("my text");
});

Iterating over jQuery selector with variable, using closures

[First time on stackoverflow.] I am trying to dynamically add html buttons to my page and then give them a javascript function to run when they are clicked, using jQuery's click. I want to have one button for each element in an array, so I used a for loop. My code looks like this (simplified)
for (var i = 0; i < results.length; i++) {
$("#" + place[i].place_id).click(function(){console.log("Test");})
$("#" + place[i].place_id).click();
}
(I inject buttons with the right id's in the same loop.) This code, when run, console logs "Test" the right number of times, but afterwards, only the last button responds "Test" when clicked. (This situation is a little absurd.) So, I think the event handler ends up using only the final value of i to assign the event handler. I think the problem has to do with closures, but I am not sure how to make a closure out of a jQuery Selector (and in general am not familiar with them).
In contrast, as a hack solution, I "manually" wrote code like the below right below and outside the for loop, and it works as expected, in that clicking causes the console log.
$("#" + place[0].place_id).click(function(){console.log("Test"););
$("#" + place[1].place_id).click(function(){console.log("Test");});
etc.
(Of course, this all occurs within a larger context - specifically a Google Maps Places API call's callback.)
First, am I understanding the problem correctly? Second, what would work? Should I take a different approach altogether, like use a .each()?
(I later would want to display a property of place[i] when clicked, which I would think would need another callback
My final hack code looks like this:
$("#" + place[0].place_id).click(function(){google.maps.event.trigger(placeMarkers[0], "click"); repeated 20 times

To do this, you can simply create a self executing function inside the for loop, like this:
for (var i = 0; i < results.length; i++) {
(function(index) {
$("#" + place[index].place_id).click(function() {
//Do something with place[index] here
});
})(i);
}

Unchecking and simulating a click on checkboxes in Javascript

I am admittedly a super newbie to programming in general. I am trying to design a quick piece of javascript to inject on a website for a class that will both uncheck and simulate a click on a series of checkboxes. This is nothing malicious, the web form we use to download data for use in this class presents way more variables than necessary, and it would be a lot more convenient if we could 'uncheck' all and only check the ones we want. However, simply unchecking the boxes via javascript injection doesn't yield the desired result. A mouse click must be simulated on each box. I have been trying to use the .click() function to no avail. Any help is greatly appreciated. My code below fails with an error of:
"TypeError: Cannot read property 'click' of null"
CODE:
var getInputs = document.getElementsByTagName("input");
for (var i = 0, max = getInputs.length; i < max; i++){
if (getInputs[i].type === 'checkbox')
getInputs[i].checked = false;
document.getElementById('shr_SUBJECT=VC' + i).click();
}
--------EDIT#1--------------
FYI, this is the website that I am trying to use this on:
http://factfinder2.census.gov/faces/nav/jsf/pages/searchresults.xhtml
if you search for and open up any of these tables they are huge. It would be awesome if I could easily pare down the variables by 'unchecking' and 'clicking' them all at once via javascript.
The code at the bottom ALMOST works.
The problem I am running into now is that it throws an error after the first or second run through the for loop:
"TypeError: document.getElementById(...) is null"
I understand that this is because the value it's trying to find doesn't exist? Sometimes on these tables the checkboxes are greyed out/don't exist or are otherwise 'unclickable'. My theory as to why I am getting this error is because in the table/form the 'available' ID's will start around:
shr_SUBJECT=VC03 or sh_SUBJECT=VC04
and it may then skip to:
shr_SUBJECT=VC06 then skip to shr_SUBJECT=VC09 and so on...
So if the for loop hits an ID that isn't available such as 05 or 07, it returns a null error :(
I did some reading and learned that javascript is able to 'catch' errors that are 'thrown' at it? My question now is that I'm wondering if there is an easy way to simply iterate to the next ID in line if this error is thrown.
Again, any and all help is appreciated, you guys are awesome.
OLD DRAFT OF SCRIPT
var getInputs = document.getElementsByTagName("input");
for (var i = 3, max = getInputs.length; i < max; i++){
if (getInputs[i].type === 'checkbox' && i < 10){
var count = i;
var endid = count.toString();
var begid = "shr_SUBJECT=VC0";
var fullid = begid.concat(endid);
document.getElementById(fullid).click();
}
else if(getInputs[i].type === 'checkbox' && i >= 10){
var count = i ;
var endid = count.toString();
var begid = "shr_SUBJECT=VC";
var fullid = begid.concat(endid);
document.getElementById(fullid).click();
}
}
--------EDIT#2----------
An example of a table that I am trying to manipulate can be found at this URL:
http://factfinder2.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=ACS_12_5YR_DP02&prodType=table#
If you click on the 'Modify Table' button, you are able to select/deselect specific variables via the checkboxes. If you right-click on a couple of 'active' checkboxes and inspect the elements, and it looks something like this:
<input id="shr_SUBJECT=VC03" checked="" alt="hide SUBJECT=VC03" name="" value="" onclick="javascript:hiderow('SUBJECT=VC03');" type="checkbox">
<input id="shr_SUBJECT=VC25" checked="" alt="hide SUBJECT=VC25" name="" value="" onclick="javascript:hiderow('SUBJECT=VC25');" type="checkbox">
Thank you so much #Jonathan Steinbeck for the tip about the ternary operator, it really cleaned up my code.
The script works properly, but the problem I am running into now is that it doesn't iterate enough times after the try, catch statement. If there is a gap in the id #'s; say it jumps from shr_SUBJECT=VC19 to shr_SUBJECT=VC=24 the script will stop running. Is there a way to make it keep retrying the try/catch until it gets a valid ID # or one that exists/is an active checkbox?
CURRENT DRAFT OF SCRIPT :
var getInputs = document.getElementsByTagName("input");
for (var i = 3, max = getInputs.length; i < max; i += 1) {
try {
if (getInputs[i].type === 'checkbox'){
document.getElementById("shr_SUBJECT=VC" + (i < 10 ? "0" : "") + i).click();
}
}
catch (err) {
i+=1;
if (getInputs[i].type === 'checkbox'){
if (getInputs[i].type === 'checkbox'){
document.getElementById("shr_SUBJECT=VC" + (i < 10 ? "0" : "") + i).click();
}
}
}
}

When you call document.getElementById() with a non-existing ID, null is returned. Therefore this error means that you're trying to call the .click() method on null, which can't work.
So you should check what the correct ID naming scheme for the elements you want is. Maybe the elements' count starts with 1 instead of 0?
Also, the .click() doesn't work for all elements like you would expect as far as I know. So depending on the kind of element you are trying to retrieve you might have to create and dispatch your own event as suggested by RobG's comment.
EDIT in response to your recent edit:
You can wrap code that throws errors in a try-catch like this:
for (var i = 3, max = getInputs.length; i < max; i += 1) {
try {
document.getElementById("the_ID").click();
}
catch (error) {
console.error(error);
// continue stops the current execution of the loop body and continues
// with the next iteration step
continue;
}
// any code here will only be executed if there's not been an error thrown
// in the try block because of the continue in the catch block
}
Also, what are you doing with the 'i' variable? It doesn't make sense to assign it to so many variables. This does the same:
document.getElementById("shr_SUBJECT=VC" + (i < 10 ? "0" : "") + i).click();
The ... ? ... : ... is an operator (called the 'ternary operator') that works like this: evaluate the expression before the "?" - if it results in a truthy value, the expression between "?" and ":" is evaluated and becomes the result of using the operator; if the condition results to false, the part after the ":" is evaluated as the value of the operator instead. So while "if" is a statement in JavaScript (and statements usually don't result in a value), the ternary operator can be used as an expression because it results in a value.
By concatenating a string with something else, you are forcing the 'something else' to be converted to string. So an expression like this will usually result in a string:
"" + someNonStringVar
Also, it doesn't make sense to define variables in a loop body in JavaScript. JavaScript variables have function scope, not block scope. What this means is that any variables defined in the loop body exist inside the whole function as well. Therefore it is recommended to write all of the "var"s at the top of your function to make it clear what their scope is. This behaviour of JavaScript is called 'hoisting', by the way.
I've furthermore taken a look at the URL you've given in your recent edit but I fail to find the kind of naming scheme for IDs you describe. In which table did you find those?
Edit in response to your second edit:
You shouldn't mess with the 'i' variable inside the body of a for loop. It makes your code much harder to reason about and is probably not what you want to do anyway. You don't need to handle the next step of the iteration in the catch block. The 'i' variable is incremented even if there's an error during fetching the element from the DOM. That's why you use catch in the first place.

Loop Elements in JQuery

I am trying to run a loop over a few elements in JQuery. Before anyone says it, I do not need .each(). I am trying to run through the elements as a genuine loop- once a successful iteration runs, the loop will break and prevent the same action being done on other elements. I looked briefly at the straight JavaScript version, with the .getElement... methods, but it is my understanding that this won't satisfy my other requirement- the list of elements to be iterated over is created via a partial-string JQuery identifier:
rows = $('tr[id^="am_assetRow_' + parentAsset.replace(/ /, "_") + '_' + type + '"]');
Does anyone know of anything that might help me get this working?
EDIT: Just a bit more information on the application: I am checking to see if a value can be inserted into an existing row of a table, and if not, creating a new row and inserting it there. Thus, I need the loop to exit if a suitable fit is found, and after the loop terminates, I need to know whether it terminated in success (placing the value) or failure (no available locations- time to create a new row).

In jquery, if you want a $.each() loop to end immediately, just return false from the function call.

Do do a normal loop without using each() but still using jquery to select the items based on partial string etc...
rows = $('tr[id^="am_assetRow_' + parentAsset.replace(/ /, "_") + '_' + type + '"]');
for (var i = 0; i < rows.length; ++i) {
rows[i]; // The raw element at this index.
$(rows[i]); // jquery collection for this one element.
if (someCondition) {
break; // Break the loop early.
}
}

Javascript taking too long to run

I have a script that is taking too long to run and that is causing me This error on ie : a script on this page is causing internet explorer to run slowly.
I have read other threads concerning this error and have learned that there is a way to by pass it by putting a time out after a certain number of iterations.
Can u help me apply a time out on the following function please ?
Basically each time i find a hidden imput of type submit or radio i want to remove and i have a lot of them . Please do not question why do i have a lots of hidden imputs. I did it bc i needed it just help me put a time out please so i wont have the JS error. Thank you
$('input:hidden').each(function(){
var name = $(this).attr('name');
if($("[name='"+name+"']").length >1){
if($(this).attr('type')!=='radio' && $(this).attr('type')!=='submit'){
$(this).remove();
}
}
});
One of the exemples i found : Bypassing IE's long-running script warning using setTimeout

You may want to add input to your jquery selector to filter out only input tags.
if($("input[name='"+name+"']").length >1){

Here's the same code optimised a bit without (yet) using setTimeout():
var $hidden = $('input:hidden'),
el;
for (var i = 0; i < $hidden.length; i++) {
el = $hidden[i];
if(el.type!=='radio' && el.type!=='submit'
&& $("[name='" + el.name + "']").length >1) {
$(el).remove();
}
}
Notice that now there is a maximum of three function calls per iteration, whereas the original code had up to ten function calls per iteration. There's no need for, say, $(this).attr('type') (two function calls) when you can just say this.type (no function calls).
Also, the .remove() only happens if three conditions are true, the two type tests and check for other elements of the same name. Do the type tests first, because they're quick, and only bother doing the slow check for other elements if the type part passes. (JS's && doesn't evaluate the right-hand operand if the left-hand one is falsy.)
Or with setTimeout():
var $hidden = $('input:hidden'),
i = 0,
el;
function doNext() {
if (i < $hidden.length) {
el = $hidden[i];
if(el.type!=='radio' && el.type!=='submit'
&& $("[name='" + el.name + "']").length >1) {
$(el).remove();
}
i++;
setTimeout(doNext, 0);
}
}
doNext();
You could improve either version by changing $("[name='" + el.name + "']") to specify a specific element type, e.g., if you are only doing inputs use $("input[name='" + el.name + "']"). Also you could limit by some container, e.g., if those inputs are all in a form or something.

It looks like the example you cited is exactly what you need. I think if you take your code and replace the while loop in the example (keep the if statement for checking the batch size), you're basically done. You just need the jQuery version of breaking out of a loop.

To risk stating the obvious; traversing through the DOM looking for matches to these CSS selectors is what's making your code slow. You can cut down the amount of work it's doing with a few simple tricks:
Are these fields inside a specific element? If so you can narrow the search by including that element in the selector.
e.g:
$('#container input:hidden').each(function(){
...
You can also narrow the number of fields that are checked for the name attribute
e.g:
if($("#container input[name='"+name+"']").length >1){
I'm also unclear why you're searching again with $("[name='"+name+"']").length >1once you've found the hidden element. You didn't explain that requirement. If you don't need that then you'll speed this up hugely by taking it out.
$('#container input:hidden').each(function(){
var name = $(this).attr('name');
if($(this).attr('type')!=='radio' && $(this).attr('type')!=='submit'){
$(this).remove();
}
});
If you do need it, and I'd be curious to know why, but the best approach might be to restructure the code so that it only checks the number of inputs for a given name once, and removes them all in one go.

Try this:
$("[type=hidden]").remove(); // at the place of each loop
It will take a short time to delete all hidden fields.
I hope it will help.
JSFiddle example