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@ohkit/dom-helper

v0.0.3

Published

html dom 操作相关工具函数

Downloads

197

Readme

@ohkit/dom-helper

DOM 背景色计算工具,提供精确的背景色计算功能。

安装

npm install @ohkit/dom-helper
# 或
yarn add @ohkit/dom-helper

功能列表

  • 计算元素实际显示背景色(考虑父元素透明度叠加)
  • RGB/RGBA颜色处理

完整 API 文档

类型定义

interface IRgb {
  r: number;
  g: number;
  b: number;
}

interface IRgba extends IRgb {
  a: number;
}

背景色计算

findEffectiveBgColor(dom: HTMLElement | null): IRgb

计算元素实际显示背景色(考虑父元素透明度叠加)

import { findEffectiveBgColor } from '@ohkit/dom-helper';

const element = document.getElementById('my-element');
const bgColor = findEffectiveBgColor(element);
console.log(bgColor); // { r: 255, g: 255, b: 255 }

mixRgbaToRgbWithXbg(rgbaList: IRgb[], xBg: IRgb): IRgb

混合多个RGBA颜色与基准背景色

import { mixRgbaToRgbWithXbg } from '@ohkit/dom-helper';

const mixedColor = mixRgbaToRgbWithXbg([
  { r: 255, g: 0, b: 0, a: 0.5 },
  { r: 0, g: 255, b: 0, a: 0.5 }
], { r: 255, g: 255, b: 255 });
console.log(mixedColor); // 混合后的RGB颜色

颜色转换

rgbaToObj(rgbaStr: string): IRgb | null

将RGBA字符串转换为对象

import { rgbaToObj } from '@ohkit/dom-helper';

const rgbaObj = rgbaToObj('rgba(255, 0, 0, 0.5)');
console.log(rgbaObj); // { r: 255, g: 0, b: 0, a: 0.5 }

hexToRgba(hex: string, alpha?: number): string

将HEX颜色转换为RGBA字符串

import { hexToRgba } from '@ohkit/dom-helper';

const rgba = hexToRgba('#ff0000', 0.5);
console.log(rgba); // "rgba(255, 0, 0, 0.5)"

rgbaToHex(rgba: string): string

将RGBA字符串转换为HEX颜色

import { rgbaToHex } from '@ohkit/dom-helper';

const hex = rgbaToHex('rgba(255, 0, 0, 0.5)');
console.log(hex); // "#ff000080"

rgbaObjToHex(rgbaObj: IRgba): string

将RGBA对象转换为HEX颜色

import { rgbaObjToHex } from '@ohkit/dom-helper';

const hex = rgbaObjToHex({ r: 255, g: 0, b: 0, a: 0.5 });
console.log(hex); // "#ff000080"

贡献

欢迎提交 Pull Request 或 Issue。