accept: {
title: ‘Images‘,
extensions: ‘jpg,jpeg,png‘,
mimeTypes: ‘image/*‘
}

改为

accept: {
title: ‘Images‘,
extensions: ‘jpg,jpeg,png‘,
mimeTypes: ‘image/jpg,image/jpeg,image/png‘ //修改这行
}

WebUploader点击上传文件选择框会延迟几秒才会显示