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@@ -6,15 +6,20 @@ |
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@@ -6,15 +6,20 @@ |
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'use strict';
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'use strict';
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+const dataAPI = '[data-sticky]';
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+
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var Sticky = function(elem, options) {
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var Sticky = function(elem, options) {
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this.options = $.extend({}, Sticky.DEAFAULT, options);
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this.options = $.extend({}, Sticky.DEAFAULT, options);
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this.$elem = $(elem);
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this.$elem = $(elem);
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this.$holder = $('<div></div>').height(this.$elem.height());
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this.$holder = $('<div></div>').height(this.$elem.height());
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+ this.$holder = this.$elem.wrap(this.$holder).parent();
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+
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+ this.stickyState = null;
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+
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+
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this.$target = $(this.options.target)
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this.$target = $(this.options.target)
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.on('scroll.yoho.sticky', $.proxy(this.checkPosition, this));
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.on('scroll.yoho.sticky', $.proxy(this.checkPosition, this));
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- this.$elem.wrapper(this.$holder);
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-
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this.checkPosition();
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this.checkPosition();
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};
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};
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@@ -24,11 +29,47 @@ Sticky.DEAFAULT = { |
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@@ -24,11 +29,47 @@ Sticky.DEAFAULT = { |
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};
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};
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Sticky.prototype.checkPosition = function() {
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Sticky.prototype.checkPosition = function() {
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- if (!this.$elem.is('::visible')) {
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+ let options = this.options;
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+
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+ if (!this.$elem.is(':visible')) {
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return;
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return;
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}
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}
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+
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+ let offsetTop = this.$holder.offset().top - options.top;
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+ let scrollTop = this.$target.scrollTop();
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+
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+ let willSticky = scrollTop >= offsetTop;
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+
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+ this.$elem.toggleClass('sticky', willSticky);
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};
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};
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+function Plugin(option) {
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+ this.each(function() {
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+ let $this = $(this);
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+ let data = $this.data('yoho.sticky');
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+ let options = typeof option === 'object' && option;
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+
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+ if (!data) {
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+ $this.data('yoho.sticky', new Sticky($this, options));
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+ }
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+
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+ if (typeof option === 'string') {
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+ $this[option]();
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+ }
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+ });
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+}
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+
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+$.fn.Stricky = Plugin;
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+$.fn.Stricky.Constructor = Sticky;
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+
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+window.onload = function() {
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+ $(dataAPI).each(function() {
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+ let $this = $(this);
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+
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+ Plugin.call($this);
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+ });
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+};
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+
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module.exports = Sticky; |
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module.exports = Sticky; |
