Develop Reference

Nightwatch dropdowns handling by passing value

Below is the approach I have used in order to select values from a dropdown using nightwatch.As you can see this is not a good approach. We can't select the specific value from dropdown unless we click on the exact element.
this.useXpath();
this.click('(//td[#class="styles_selectDropdownContainer__2Vrns"])[1]')
this.useCss();
this.click('#react-select-6-option-1')
In selenium java there is a very good option like below
Select fruits = new Select(driver.findElement(By.id("fruits")));
fruits.selectByVisibleText("Banana");
I want to know of there is a similar approach can be used in nightwatch as well?

This is not built up using Select and Option tag so inbuilt selenium functions wouldn't work. Work around would be to click first on the parent span and then in list store every div (which is option), iterate the loop and for each web element if text matches with your desired text you can click on it.
Code :
this.useCss();
this.click("span[aria-live='polite']")
Now store options in a list :
var elements = document.querySelectorAll('.elements'); // use
//div[contains(#class,'option')] as element selector.
Now iterate the list :
// Iterate over them.
[].forEach.call(elements, function (element) {
// Manipulate each element.
element.click();
});
});

Cannot select all elements except one

I am trying to select all the elements of a page except one, inside a function:
$('#sidebutton').click(function () {
if (!$('.sidemenu').hasClass("current")) {
prevScrolPos = $(window).scrollTop();
scrollTo = 0;
} else {
scrollTo = prevScrolPos;
}
$('.hidelem').toggleClass("hidden");
$('.sidemenu').toggleClass("current");
$('html,body').scrollTop(scrollTo);
});
It works when I use a simple class selector (.hidelem), but doesn't when I use something a bit more complicated (for example, $("*:not(.sidemenu)").toggleClass("hidden"); or $("*").not(".sidemenu").toggleClass("hidden");); these just lead to a blank window.
Could you tell me what I'm missing here?
JSFiddle: https://jsfiddle.net/et978wjw/5/ (full functionality is missing but I hope you get the idea)

The problem is that you may be skipping .sideMenu with $("body *:not(.sidemenu)"), but you are not skipping its parent DIV. If you hide an ancestor, you hide all its descendants too. You also do not skip any descendants, so the children of .sidemenu are also hidden
So you need to exclude anything that is an ancestor of .sidemenu with :not:(has()), then exclude the sidemenu itself, then exclude any children of sidemenu:
$("#container :not(:has(.sidemenu)):not(.sidemenu):not('.sidemenu *')").toggleClass("hidden");
JSFiddle: https://jsfiddle.net/TrueBlueAussie/et978wjw/8/
You really should direct the hide/show at something more specific though. Perhaps a wrapper div around everything you want hidden? I added one for the demo.
Now having said all that, your selection process is quite complicated. You would be better off simply adding a class to all the things you want to toggle instead and just toggle those (you already have nodisplay on the divs, so I used that for now).
e.g. just this:
$(".nodisplay").toggleClass("hidden");
JSFiddle: https://jsfiddle.net/TrueBlueAussie/et978wjw/9/

Select node from children by attribute

I have an interface that switches between displaying different div elements. When it switches which element it displays, I need to access a specific child node of that div element, with each div element having their children arranged differently.
The childNodes and children property both return an object that can only select children with item(index) which is annoying to use as the relevant child element's index is different in each div. For Protractor, I used the webmanager.by(selector) which was able to search with other parameters than index. Is there something similar I can use to select the child node with data-relevant="true". I am also unsure if that attribute is the best way to specify in the HTML which child node is relevant.
This is an Angular application if that helps.

If you want to select the child node with data-relevant="true" from some parent element, you could use the selector method
element.querySelector()
That would return the first matching element...
in your specific case it could be something like
parent-element.querySelector( "[data-relevant='true']" );
or if you want to select all paragraphs p with the data-relevant attribute value true within the parent div: parentDiv.querySelectorAll( "p[data-relevant='true']" );
You can find some examples on
http://www.w3.org/TR/selectors-api/#processing-selectors
An alternative would be to use a special class to identify which child node is relevant...
you could get this element/or many elements with getElementsByClassName(someClassName)
Code Sample With .querySelectorAll() method:
<script type="text/javascript">
window.addEventListener("load", init, false);
function init(){
var parentDiv = document.getElementById("divWithChildren");
var relevantChildren = parentDiv.querySelectorAll( "[data-relevant='true']" );
alert (relevantChildren[2].id); // this will give the id of the 3rd child element with data-relevant='true'
}
</script>

What's a good way to show parts of an element but hide the rest?

I was wanting to have a javascript (jQuery) function that removed everything that didn't have the safe class.
The problem is, if the parent element is hidden, it cannot show the 'safe' part of it.
Is there a simple way to get around this? I'd rather not go in and span all of the elements that need removed.
trimmer = function(element){
x = $(element+' *:not(.safe)');
x.hide();
}
trimmer('section');
Fiddle

var element = 'section';
//finds all non `.safe` elements in `section`s and hides them
$(':not(.safe)', element).hide();
//finds all `.safe` elements in `section`s and shows the `section`s
$('.safe', element).parents(element).show();

Horen was right, it is indeed impossible to show parts of a hidden element.
To make only parts of the text disappear, the non-safe content must be labeled for removal.
$(element).contents().each(function() {
if (this.nodeType == 3)
$(this).wrap('<span class="disappear" />');
});
You can read more about this answer here:
How to add spans to all areas of a node that isn't restricted

How do I get the element containing clicked text in Javascript/Jquery?

I would like to replace the text on pages when I click on the text or even just replace the single word clicked on. I have tried a top down approach selecting all elements in the DOM, filtering out the textNodes, wrapping each with tags and adding a click event handler to each tag. But this is far too slow and inefficient particularly on very large and dynamic sites.
I only need to replace the text that was clicked. Is there a bottom up way of doing this starting from the event.target? How do I find the closest textNode to the event.target, for example?

In the example you gave, you can just do the following; for more info see How do I select text nodes with jQuery?
$(document).click(function(event) {
textNodes = $(event.target).contents().filter(function() {
return this.nodeType == 3;
});
textNodes.each( function() {
$(this).replaceWith("New Text");
});
})

Have you tried Jquery's .closest() ?
Description: For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.