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How do I add a simple onClick event handler to a canvas element?
...element.left && x < element.left + element.width) {
alert('clicked an element');
}
});
}, false);
// Add element.
elements.push({
colour: '#05EFFF',
width: 150,
height: 100,
top: 20,
left: 15
});
// Render elements.
elements.forEach(function(...
Understanding the difference between Object.create() and new SomeFunction()
... whereas Object.create will not execute code such as
function Foo() {
alert("This constructor does not run with Object.create");
}
Note that if you use the two-parameter version of Object.create() then you can do much more powerful things.
...
What underlies this JavaScript idiom: var self = this?
...defaultprop';
document.addEventListener('click', (event) => {
alert(that.someprop);
});
}
new MyConstructor({
someprop: "Hello World"
});
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How to make an AJAX call without jQuery?
...t;
}
else if (xmlhttp.status == 400) {
alert('There was an error 400');
}
else {
alert('something else other than 200 was returned');
}
}
};
xmlhttp.open("GET", "ajax_info.txt", true);
xmlhttp.se...
What does [object Object] mean?
I am trying to alert a returned value from a function and I get this in the alert:
9 Answers
...
jQuery - Illegal invocation
... cache : false,
processData: false
}).done(function(response) {
alert(response);
});
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What is non-blocking or asynchronous I/O in Node.js?
...n the code. In the following example, the synchronous operation causes the alerts to fire in sequence. In the async operation, while alert(2) appears to execute second, it doesn't.
Synchronous: 1,2,3
alert(1);
alert(2);
alert(3);
Asynchronous: 1,3,2
alert(1);
setTimeout(() =>...
Create a custom callback in JavaScript
...', 'goes', 'here');
}
function foo(a, b, c) {
// I'm the callback
alert(a + " " + b + " " + c);
}
doSomething(foo);
That will call doSomething, which will call foo, which will alert "stuff goes here".
Note that it's very important to pass the function reference (foo), rather than callin...
How can I get a Bootstrap column to span multiple rows?
...
<div class="row">
<div class="col-4 alert alert-primary">
1
</div>
<div class="col-8">
<div class="row">
<div class="col-6 alert alert-primary">
2
</div>
<div class="col-6 alert alert-pr...
window.close and self.close do not close the window in Chrome
...regardless it is supposed to still do it, even if it requires to pop up an alert to confirm. These are not happening.
16 An...