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index.js
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index.js
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'use strict';
var Emitter = require('tiny-emitter');
var debounce = require('debounce');
var EVENT_NAME = 'resize';
var emitter = new Emitter();
var debounceTime;
var debounced;
var isiOS = (/ip(hone|od|ad)/i).test(window.navigator.userAgent.toLowerCase()) && !window.MSStream;
var size = module.exports = {
width: 0,
height: 0,
hasBar: false,
isLandscape: false,
addListener: function(listener, context) {
emitter.on(EVENT_NAME, listener, context);
},
removeListener: function(listener, context) {
if(listener) emitter.off(EVENT_NAME, listener, context);
},
bind: function(opts) {
opts = opts || {};
size.unbind();
debounceTime = opts.debounceTime || 150;
debounced = debounce(onEvent, debounceTime);
window.addEventListener(EVENT_NAME, debounced);
},
unbind: function() {
window.removeEventListener(EVENT_NAME, debounced);
}
};
function onEvent() {
if (isiOS) {
size.hasBar = size.width > size.height && size.height > window.innerHeight;
}
size.width = window.innerWidth;
size.height = window.innerHeight;
size.isLandscape = size.width > size.height;
emitter.emit(EVENT_NAME, size.width, size.height);
}
onEvent();
size.bind();