dom-align

dom-align

---

align source html element with target html element flexibly.

Screenshot

Install

Feature

• support IE9+ chrome firefox
• support align points and offset
• support auto adjust according to visible area

Online Demo

• http://yiminghe.github.io/dom-align/

Usage

import domAlign from 'dom-align';

// use domAlign
// sourceNode's initial style should be position:absolute;left:-9999px;top:-9999px;

const alignConfig = {
  points: ['tl', 'tr'],        // align top left point of sourceNode with top right point of targetNode
  offset: [10, 20],            // the offset sourceNode by 10px in x and 20px in y,
  targetOffset: ['30%','40%'], // the offset targetNode by 30% of targetNode width in x and 40% of targetNode height in y,
  overflow: { adjustX: true, adjustY: true }, // auto adjust position when sourceNode is overflowed
};

domAlign(sourceNode, targetNode, alignConfig);

API

void domAlign(source: HTMLElement, target: HTMLElement, alignConfig: Object):Function

alignConfig object details

name	type	description
points	String[2]	move point of source node to align with point of target node, such as ['tr','cc'], align top right point of source node with center point of target node. point can be 't'(top), 'b'(bottom), 'c'(center), 'l'(left), 'r'(right)
offset	Number[2]	offset source node by offset[0] in x and offset[1] in y. If offset contains percentage string value, it is relative to sourceNode region.
targetOffset	Number[2]	offset target node by offset[0] in x and offset[1] in y. If targetOffset contains percentage string value, it is relative to targetNode region.
overflow	Object: `{ adjustX: boolean, adjustY: boolean, alwaysByViewport:boolean }`	if adjustX field is true, then will adjust source node in x direction if source node is invisible. if adjustY field is true, then will adjust source node in y direction if source node is invisible. if alwaysByViewport is true, the it will adjust if node is not inside viewport
useCssRight	Boolean	whether use css right instead of left to position
useCssBottom	Boolean	whether use css bottom instead of top to position
useCssTransform	Boolean	whether use css transform instead of left/top/right/bottom to position if browser supports. Defaults to false.

Development

npm install
npm start

Example

http://localhost:8020/examples/

Test Case

npm test
npm run chrome-test

Coverage

npm run coverage

open coverage/ dir

License

dom-align is released under the MIT license.