Heunsig Jo Heunsig

Updating arrays of elements with function refs in Vue 3

I did a screencast series recently talking about my favorite Vue 3 feature: function refs. Check out the screencast series for more context-in this gist, I'm going to answer a fantastic question I got in one of the videos' comment section.

This question was about how to properly update arrays of elements that are captured by function refs. Let's check out the basic principle first, before we look at the details of the question.

<script setup>
import { ref, onBeforeUpdate } from 'vue'

Awesome-Selfhosted

Selfhosting is the process of locally hosting and managing applications instead of renting from SaaS providers.

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See Contributing.

DOM Performance

How the browser renders the document
- Receives the data (bytes) from the server.
- Parses and converts into tokens (<, TagName, Attribute, AttributeValue, >).
- Turns tokens into nodes.
- Turns nodes into the DOM tree.
Builds CSSOM tree from the css rules.

Nice answer on stackoverflow to the question of when to use one or the other content-types for POSTing data, viz. application/x-www-form-urlencoded and multipart/form-data.

“The moral of the story is, if you have binary (non-alphanumeric) data (or a significantly sized payload) to transmit, use multipart/form-data. Otherwise, use application/x-www-form-urlencoded.”

Matt Bridges' answer in full:

The MIME types you mention are the two Content-Type headers for HTTP POST requests that user-agents (browsers) must support. The purpose of both of those types of requests is to send a list of name/value pairs to the server. Depending on the type and amount of data being transmitted, one of the methods will be more efficient than the other. To understand why, you have to look at what each is doing

	<!DOCTYPE html>
	<html lang="en">

	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>My Angular from Scratch</title>
	<style>
	.my-component {
	font-family: Arial, sans-serif;

	[
	// =======================================================
	// 본 자료는 CC0-1.0 라이선스를 따릅니다.
	// https://creativecommons.org/publicdomain/zero/1.0/deed
	// 저작권자의 허락을 구하지 않아도 상업적인 목적을 포함한 어떠한 목적으로든
	// 자유롭게 복사, 수정, 배포, 실연할 수 있습니다.
	// =======================================================
	// 모든 정보는 직접 수집하여 정리한 정보입니다.
	// 일부 정보가 오기되었거나, 위/경도 좌표가 부정확할 수 있습니다.
	// Gist 댓글을 통해 오류를 제보해주세요.

	Add the `replication` section to the mongod.conf file:

	```
	$cat /usr/local/etc/mongod.conf
	systemLog:
	destination: file
	path: /usr/local/var/log/mongodb/mongo.log
	logAppend: true
	storage:
	engine: mmapv1

	/**
	* return the distance between two points.
	*
	* @param {number} x1 x position of first point
	* @param {number} y1 y position of first point
	* @param {number} x2 x position of second point
	* @param {number} y2 y position of second point
	* @return {number} distance between given points
	*/
	Math.getDistance = function( x1, y1, x2, y2 ) {

	function randomDate(start, end) {
	return new Date(start.getTime() + Math.random() * (end.getTime() - start.getTime()))
	}

	console.log(randomDate(new Date(2012, 0, 1), new Date()))