Let’s say, a click event happens inside a shadow DOM of <user-card> component.… Outer target: USER-CARD – document event handler gets shadow host as the target.… From its point of view, the event happened on <user-card>.… gt;Name</b>, then, as it bubbles out of the shadow DOM, its event.target is reset to <user-card… the shadow tree was created with {mode: 'closed'}, then the composed path starts from the host: user-card
treats each byte in ArrayBuffer as a separate number, with possible values from 0 to 255 (a byte is 8-… Such value is called a “8-bit unsigned integer”.… Float64Array – treats every 8 bytes as a floating point number with possible values from 5.0x10-324 to… Uint8ClampedArray – for 8-bit integers, “clamps” them on assignment (see below).… Uint8ClampedArray – for 8-bit integers, “clamps” them on assignment.
create it:
label – the encoding, utf-8… The only encoding it supports is “utf-8”
Selectors like :host apply rules to <custom-dialog> element or <user-card>, but how to style… For example, in shadow DOM we can use --user-card-field-color CSS variable to style fields, and the… Then, we can declare this property in the outer document for <user-card
Here, <user-card> shadow DOM provides two slots, filled from light DOM:… " attribute is only valid for direct children of the shadow host (in our example, <user-card&… For example, the second <span> here is ignored (as it’s not a top-level child of <user-card&… For example, let’s add the default slot to our <user-card> that shows all unslotted information
are not allowed, must be encoded, for instance non-latin letters and spaces – replaced with their UTF-8… The URL became longer, because each cyrillic letter is represented with two bytes in UTF-8, so there
Any other operation like assignment hi = user.hi discards the reference type as a whole, takes the value
Here it checks that the result of pow(2, 3) equals 8.… That’s logical: we have an empty function code in pow, so pow(2,3) returns undefined instead of 8.… Sure, our function always returns 8, while the assert expects 81.
ArrayBuffer.
readAsText(blob, [encoding]) – read the data as a text string with the given encoding (utf-8
A stack is usually illustrated as a pack of cards: new cards are added to the top or taken from the top
They can store any value:
There are 8
Please note, if the request body is a string, then Content-Type header is set to text/plain;charset=UTF-8
Please also click on the number for line 8.
Summary.There are 8 basic data types in JavaScript.
JavaScript engines also may optimize it, discard variables that are unused to save memory and perform
than that, the browser leverages the graphics accelerator (a special chip on the CPU or graphics card
Context: { x: 2, n: 3, at line 5 }
pow(2, 3)
When it finishes, we have a result of pow(2, 3) = 8.