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Protractor - Clicking button in div which has a span with certain text

I have a problem with clicking a button in Protractor. Simplified code looks like that:
<div class = "container">
<div class = "col1">
<span class = "hour">12:00</span>
</div>
<div class="col2">
<button class="btn">Test</button>
</div>
</div>
<div class = "container">
<div class = "col1">
<span class = "hour">13:00</span>
</div>
<div class="col2">
<button class="btn">Test</button>
</div>
</div>
I would like to click a button in div, where its span has "12:00" hour. The condition must check the hour.
I can easily check the span with
by.xpath('//span[contains(text(), "12:15")]')
My main concern is to select the button with parent div having this span. Is this possible?
Thank you.

I had a similar condition. But I had just to extract a value from DOM and compare it with the expected result, it looks like this:
records = await targeting_page.records.getText();
recordsNumber = parseFloat(records.replace(/,/g, ''));
recordsRange = recordsNumber >= 100 && recordsNumber < 90000000;
await expect(recordsRange).toEqual(true);
but your occasion is not a big difference.
that what I have written in browser console on this page of your question
async function fin() {
for(var i = 0; i < 100; i++) {
var myElement = document.querySelector("code span:nth-child(27)").textContent //your find your desired element
console.log(b)
typeof b == 'string' ? console.log(true) : console.log(false) //this is optionally
var res = parseFloat(b) //parse when it will be 12:00 you will get the 12 number
console.log(res)
res == 13 ? await b.click() : console.log("The button is not ready yet") //and here compare is there that number you need, if yes then click element(this doesn't work in console,
// if you use async/await in your protractor tests, there are it will work
}
}
fin()
That's what concerns directly this page.
In test, it will be looking something like this(it can be much better but I drafted it very quckly):
for(let i=0; i < 100; i++) {
var myE = await myElement.getText(); //where myElement -- your selector
var myNumber = parseFloat(myE.replace(/:/g, '')); // parse and get 12 out of "12:00"
if (myNumber == 12) {
await myElement.click()
} else {
console.log("The button is not ready yet")
}
}

by.xpath('//span[contains(text(), "12:15")]/ancestor::div//button[#class='btn']')
Hope this answer helps you!!
0506

Issue with getting a keyup function to get sum of input field values using plain Javascript

I'm working on a personal project and I've run into an issue that I haven't been able to solve.
Here is a function that generates new table rows into a table (with id of "tableData") when a button is clicked:
function addNewRow(){
var tableEl = document.getElementById("tableData");
var newLine = '<tr class="newEntry">';
var classArray = ["classA", "classB", "classC", "classD"];
for (var i = 0; i < classArray.length; i++){
newLine += '<td><input class="' + classArray[i] + '"></td>';
}
newLine += '</tr>';
tableEl.insertAdjacentHTML("beforeend", newLine);
}
document.getElementById("addRow").addEventListener("click", addNewRow, false);
//the element with id="addRow" is a button
I've simplified the code for the above function for the sake of readability as it's not the focus of the problem. When the button is clicked, a new row is added successfully.
The problematic part involves another function that takes the sum of the respective classes of each row and displays them in a div.
The goal is to get the sum of the values of all input fields with matching class names. For example, let's say I use the addNewRow function to get six rows. Then I want to have the div showing the sum of the values of all input fields with the class name of "classA"; the number in that div should be the sum of those six values, which gets updated as I type in the values or change the existing values in any of the input fields with class name of "ClassA".
function sumValues(divId, inputClass){
var sumVal = document.getElementsByClassName(inputClass);
var addedUp = 0;
for (var j = 0; j < sumVal.length; j++){
addedUp += Number(sumVal[j].value);
}
document.getElementById(divId).innerHTML = addedUp;
}
Here are a couple (out of several) failed attempts:
document.input.addEventListener("keyup", sumValues("genericDivId", "classA"), false);
document.getElementsByClassName("classA").onkeyup = function(){sumValues("genericDivId", "classA");}
Unfortunately, after scouring the web for a solution and failing to find one, I just added an event listener to a button that, when clicked, would update the div to show the sum of values. Also had to modify the sumValues function to take values from an array rather than accepting arguments.
My question is: How can I modify the code so that the sum value updates as I type in new values or change existing values using pure Javascript (vanilla JS)?

You are very close, document.getElementsByClassName() returns an array of DOM objects, you need to set the onkeyup function for each and every element by looping through that array.
var classA = document.getElementsByClassName('classA'); // this is an array
classA.forEach(function(elem){ // loop through the array
elem.onkeyup = function(){ // elem is a single element
sumValues("genericDivId", "classA");
}
}
Hopefully this fixes your issue

Maybe the example below is not same with your situation, but you'll get the logic, easily. Anyway, do not hesitate to ask for more guide.
document.getElementById("row_adder").addEventListener("click", function() {
var t = document.getElementById("my_table");
var r = t.insertRow(-1); // adds rows to bottom - change it to 0 for top
var c = r.insertCell(0);
c.innerHTML = "<input class='not_important_with_that_way' type='number' value='0' onchange='calculate_sum()'></input>";
});
function calculate_sum() {
var sum = ([].slice.call(document.querySelectorAll("[type=number]"))).map(e=>parseFloat(e.value)).reduce((a, b) => a+b);
document.getElementById("sum").innerHTML = sum;
}
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<div>
<p>
<strong>Sum</strong>:<span id="sum">0</span>
</p>
</div>
<button id="row_adder">
Click me
</button>
<table id="my_table">
</table>
</body>
</html>

How to make elements appear only when button is clicked in javascript

I'm trying to get answer to display when I press the Show Button but I can't get it to work. Could someone help me understand what I am doing wrong. I can get the first part to work where I generate a random integer. But the second part does not execute (JSFiddle).
<!DOCTYPE html>
<html>
<body>
<button class="button" onclick="disp()">Generate</button>
<button class="button" onclick="show_ans()">Show</button>
<script>
function disp() {
var i = Math.floor((Math.random() * 51) + 1);
var j = 2 * i;
document.getElementById("Goal").innerHTML = [i];
function show_ans() {
document.getElementById("answer").innerHTML = [j];
}
}
</script>
<p> Random Integer:
<span id="Goal"></span>
</p>
<p> Computed Answer:
<span id="answer"></span>
</p>
</body>
</html>

show_ans only exists within the scope of the disp function, so anything outside that scope (such as the rest of the page) can't invoke it.
Move it outside that function:
function disp() {
//...
}
function show_ans() {
//...
}
Of course, since show_ans also relies on j, that too will need to exist in a scope where both functions can access it:
var j;
function disp() {
var i = Math.floor((Math.random() * 51) + 1);
j = 2 * i;
document.getElementById("Goal").innerHTML = [i];
}
function show_ans() {
document.getElementById("answer").innerHTML = [j];
}

Show Multiplication Tables with a button

I want to make a page with JavaScript that has a button saying "Multiplication Tables." When I click the button, the multiplication table of 5 will show up in the "p" tag with the id "tables." I want to use a for loop to calculate the tables. Nothing is happening when I click the button.
HTML:
<body>
<button type="button" id="multiplication" onclick="table()">Multiplication Tables</button>
<br/>
<p id="tables"></p>
</body>
</html>
JavaScript:
function table()
{
var button = document.getElementById('multiplication');
var showTables = '';
for (var i=1; i<12; i++) {
showTables += 5 + "*" + i +"="+5*i + '\n';
}
var p_tables = document.getElementById('tables').innerHTML = showTables;
}
table();

Check this snippet by clicking run snippet button below, I think it's working fine
function table()
{
var button = document.getElementById('multiplication');
var showTables = '';
for (var i=1; i<12; i++) {
showTables += 5 + "*" + i +"="+5*i + '\n';
}
var p_tables = document.getElementById('tables').innerHTML = showTables;
}
<html>
<body>
<button type="button" id="multiplication" onclick="table()">Multiplication Tables</button>
<br/>
<p id="tables"></p>
</body>
</html>
Your are missing html tag before body and there might be some problem with your javascript inclusion, Also don't run table() function after declaring it.
Place the script either in head tag or before closing the body. Remove table() function calling after declaring it.

Dynamically generating a button using DOM and editing onclick event

I trying to generate an input (type="button") and setting the onclick-Event to a function, which should hand over a parameter. The whole object should be appended to a div and thats it. Basically this is my try, but I can't see why it does not work.
I pasted the code to jsfiddle, hence its easier for you to reproduce. Click here.
What am I'm doing wrong? I'm learning it by trial and error, so please explain whats wrong. Thanks a lot!
[edit] for the case jsfiddle will be down one day, here is the code I tried to run... :)
<!doctype html>
<html>
<head>
<title>onclick event example</title>
<script type="text/javascript" language="javascript">
var i = 0;
var h = new Array();
function addButton() {
i++;
var container = document.getElementById("check0");
var h[i] = document.createElement("input");
h[i].type = 'button';
h[i].name = 'number' + i;
h[i].value = "number" + i;
h[i].id = 'number' + i;
h[i].onclick = function() {
showAlert(i)
};
container.appendChild(h[i]);
}
function showAlert(number) {
alert("You clicked Button " + number);
}​
</script>
</head>
<body>
<div id="check0">
<input type="button" value="klick mich" id="number0" onclick="addButton()"/>
</div>​
</body>
</html>

Here is the fixed fiddle for you.
var h[i] = ... is invalid JavaScript.
What you write in the "JavaScript" frame on jsfiddle is executed onload, so this code is not yet present when the HTML you provide is executed (and neither is the addButton() function).
<script>
var i = 0;
var h = new Array();
function addButton() {
i++;
var container = document.getElementById("check0");
h[i] = document.createElement("input");
h[i].type = 'button';
h[i].name = 'number' + i;
h[i].value = "number" + i;
h[i].id = 'number' + i;
h[i].onclick = function() {
showAlert(i)
};
container.appendChild(h[i]);
}
function showAlert(number) {
alert("You clicked Button " + number);
}
</script>
<div id="check0">
<input type="button" value="klick mich" id="number0" onclick="addButton()"/>
</div>​

Try using h.push(...) instead of trying to send to a non created element in the array

var x = document.getElementById('pagination');//pagination is an empty div in html
var y ='';
for(var i = 0; i <= (pageMax); i++){
y = y+"<a id ='pageNumber"+i+"' onclick='changePage("+(i+1)+");'>"+(i+1)+"</a>\n ";
} x.innerHTML=y }
i used this to make a pagination for a table. The function will create a row of numbers until button max. 'changePage("+(i+1)+"); ... will call a function and send the i index(number that the page is) of the pagenumber. also i dynamically create a id unique for each number.