From bf491afde4157960680cdd8763ed016bd5a17620 Mon Sep 17 00:00:00 2001 From: Daniel Korte Date: Wed, 26 Nov 2014 14:29:56 -0600 Subject: [PATCH] Remove window event listeners when plugin is destroyed --- background-check.js | 23 ++++++++++++++----- background-check.min.js | 2 +- .../build/scripts/background-check.min.js | 2 +- 3 files changed, 19 insertions(+), 8 deletions(-) diff --git a/background-check.js b/background-check.js index 5aadb32..d45ca40 100755 --- a/background-check.js +++ b/background-check.js @@ -19,6 +19,8 @@ 'use strict'; var resizeEvent = window.orientation !== undefined ? 'orientationchange' : 'resize'; + var resizeFn; + var scrollFn; var supported; var canvas; var context; @@ -70,12 +72,14 @@ canvas.style.width = '100%'; canvas.style.height = '100%'; - window.addEventListener(resizeEvent, throttle.bind(null, function () { + resizeFn = throttle.bind(null, function () { resizeCanvas(); check(); - })); + }); + window.addEventListener(resizeEvent, resizeFn); - window.addEventListener('scroll', throttle.bind(null, check)); + scrollFn = throttle.bind(null, check); + window.addEventListener('scroll', scrollFn); resizeCanvas(); check(); @@ -88,6 +92,13 @@ * Destructor */ function destroy() { + if (supported) { + window.removeEventListener(resizeEvent, resizeFn); + window.removeEventListener('scroll', scrollFn); + resizeFn = null; + scrollFn = null; + } + supported = null; canvas = null; context = null; @@ -241,7 +252,7 @@ */ function kill(start) { var duration = new Date().getTime() - start; - + log('Duration: ' + duration + 'ms'); if (duration > get('maxDuration')) { @@ -540,7 +551,7 @@ for (var t = 0; t < targets.length; t++) { target = targets[t]; target = get('changeParent') ? target.parentNode : target; - + classList(target, get('classes').light, 'remove'); classList(target, get('classes').dark, 'remove'); classList(target, get('classes').complex, 'remove'); @@ -549,7 +560,7 @@ /* - * Calculate average pixel brightness of a region + * Calculate average pixel brightness of a region * and add 'light' or 'dark' accordingly */ function calculatePixelBrightness(target) { diff --git a/background-check.min.js b/background-check.min.js index a1dafcb..82d9e12 100644 --- a/background-check.min.js +++ b/background-check.min.js @@ -2,4 +2,4 @@ http://kennethcachia.com/background-check v1.2.2 */ -!function(a,b){"function"==typeof define&&define.amd?define(b):a.BackgroundCheck=b(a)}(this,function(){"use strict";function a(a){if(void 0===a||void 0===a.targets)throw"Missing attributes";H.debug=d(a.debug,!1),H.debugOverlay=d(a.debugOverlay,!1),H.targets=g(a.targets),H.images=g(a.images||"img",!0),H.changeParent=d(a.changeParent,!1),H.threshold=d(a.threshold,50),H.minComplexity=d(a.minComplexity,30),H.minOverlap=d(a.minOverlap,50),H.windowEvents=d(a.windowEvents,!0),H.maxDuration=d(a.maxDuration,500),H.mask=d(a.mask,{r:0,g:255,b:0}),H.classes=d(a.classes,{dark:"background--dark",light:"background--light",complex:"background--complex"}),void 0===B&&(h(),B&&(C.style.position="fixed",C.style.top="0px",C.style.left="0px",C.style.width="100%",C.style.height="100%",window.addEventListener(G,x.bind(null,function(){k(),w()})),window.addEventListener("scroll",x.bind(null,w)),k(),w()))}function b(){B=null,C=null,D=null,H={},E&&clearTimeout(E)}function c(a){z("debug")&&console.log(a)}function d(a,b){return e(a,typeof b),void 0===a?b:a}function e(a,b){if(void 0!==a&&typeof a!==b)throw"Incorrect attribute type"}function f(a){for(var b,d,e=[],f=0;f1)throw"Multiple backgrounds are not supported";if(!d||"none"===d)throw"Element is not an but does not have a background-image";e[f]={img:new Image,el:e[f]},d=d.slice(4,-1),d=d.replace(/"/g,""),e[f].img.src=d,c("CSS Image - 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