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1.JavaScript字符串

2.JavaScript数组

var readyState = 'loaded'
if (readyState == 'loaded' || readyState == 'complete') console.log('onload')

var rreadyState = /complete|loaded/
if (rreadyState.test(readyState)) console.log('onload')

if (~['complete', 'loaded'].indexOf(readyState)) console.log('onload')

3.JavaScript对象