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Jeff Lee RebootJeff

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@paulirish
paulirish / what-forces-layout.md
Last active Jan 20, 2022
What forces layout/reflow. The comprehensive list.
View what-forces-layout.md

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
@gaearon
gaearon / ReduxMicroBoilerplate.js
Last active Mar 26, 2020
Super minimal React + Redux app
View ReduxMicroBoilerplate.js
import React, { Component } from 'react';
import { createStore, combineReducers, applyMiddleware, bindActionCreators } from 'redux';
import { provide, connect } from 'react-redux';
import thunk from 'redux-thunk';
const AVAILABLE_SUBREDDITS = ['apple', 'pics'];
// ------------
// reducers
// ------------
@woonketwong
woonketwong / jugglingDBWithPostgres
Last active Dec 29, 2015
JugglingDB with Postgres
View jugglingDBWithPostgres
var q = require('q');
var Schema = require('jugglingdb').Schema;
var schema = new Schema('postgres', {
database: 'woonketwong',
username: 'woonketwong'
});
// The first argument to schema.define is the table
// and schema name. Do not use any capital letter
// in the table name because the database create table