Native JS implements responsive waterfall stream layout and js waterfall Layout

Native JS implements responsive waterfall stream layout and js waterfall Layout

Native JS Implementation of waterfall flow layout, code and demo Code address: https://github.com/leozdgao/responsive_waterfall

Demo: http://leozdgao.github.io/demo/responsive_waterfall/

Demo diagram:

Core code:

Responsive_waterfall.js

(function() {  var Waterfall = function(opts) {    var minBoxWidth;    Object.defineProperty(this, 'minBoxWidth', {      get: function() { return minBoxWidth; },      set: function(value) {        if(value < 100) value = 100;        if(value > 1000) value = 1000;                 minBoxWidth = value;      }    });     opts = opts || {};    var containerSelector = opts.containerSelector || '.wf-container';    var boxSelector = opts.boxSelector || '.wf-box';     // init properties    this.minBoxWidth = opts.minBoxWidth || 250;    this.columns = [];    this.container = document.querySelector(containerSelector);    this.boxes = this.container ?       Array.prototype.slice.call(this.container.querySelectorAll(boxSelector)) : [];     // compose once in constructor    this.compose();     // handle the image or something which might change size after loaded    var images = this.container.querySelectorAll('img'), that = this;    var clr;    for (var i = 0; i < images.length; i++) {      var img = images[i];      img.onload = function() {        if(clr) clearTimeout(clr);         clr = setTimeout(function() {          that.compose(true);        }, 500);      }    }     window.addEventListener('resize', function() {      that.compose();    });  }   // compute the number of columns under current setting  Waterfall.prototype.computeNumberOfColumns = function() {    var num = Math.floor(this.container.clientWidth / this.minBoxWidth);    num = num || 1; // at least one column     return num;  }   // init enough columns and set the width  Waterfall.prototype.initColumns = function(num) {    if(num > 0) {      // create column div      this.columns = [];      var width = (100 / num) + '%';      while(num--) {        var column = document.createElement('div');        column.className = 'wf-column';        column.style.width = width;        this.columns.push(column);        this.container.appendChild(column);      }    }  }   // get the index of shortest column  Waterfall.prototype.getMinHeightIndex = function() {    if(this.columns && this.columns.length > 0) {      var min = this.columns[0].clientHeight, index = 0;      for (var i = 1; i < this.columns.length; i++) {        var columnElem = this.columns[i];        if(columnElem.clientHeight < min) {          min = columnElem.clientHeight;          index = i;        }      }      return index;    }    else return -1;  }   // compose core  Waterfall.prototype.compose = function(force) {    var num = this.computeNumberOfColumns();    var cols = this.columns.length;         if(force || num != cols) {      // remove old column      for (var i = 0; i < this.columns.length; i++) {        var columnElem = this.columns[i];        columnElem.remove();      }       // init new column      this.initColumns(num);       // compose      for (var i = 0, l = this.boxes.length; i < l; i++) {        var box = this.boxes[i];        this.addBox(box);      }    }  }   // add a new box to grid  Waterfall.prototype.addBox = function(elem) {    // push if new box    if(this.boxes.indexOf(elem) < 0) this.boxes.push(elem);     var columnIndex = this.getMinHeightIndex();    if(columnIndex > -1) {      var column = this.columns[columnIndex];      column.appendChild(elem);    }  }   window.Waterfall = Waterfall;})()

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