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/**
* 对象转url参数
* @param {*} data,对象
* @param {*} isPrefix,是否自动加上"?"
*/
function queryParams(data = {}, isPrefix = true, arrayFormat = 'brackets') {
let prefix = isPrefix ? '?' : ''
let _result = []
if (['indices', 'brackets', 'repeat', 'comma'].indexOf(arrayFormat) == -1) arrayFormat = 'brackets';
for (let key in data) {
let value = data[key]
// 去掉为空的参数
if (['', undefined, null].indexOf(value) >= 0) {
continue;
}
// 如果值为数组,另行处理
if (value.constructor === Array) {
// e.g. {ids: [1, 2, 3]}
switch (arrayFormat) {
case 'indices':
// 结果: ids[0]=1&ids[1]=2&ids[2]=3
for (let i = 0; i < value.length; i++) {
_result.push(key + '[' + i + ']=' + value[i])
}
break;
case 'brackets':
// 结果: ids[]=1&ids[]=2&ids[]=3
value.forEach(_value => {
_result.push(key + '[]=' + _value)
})
break;
case 'repeat':
// 结果: ids=1&ids=2&ids=3
value.forEach(_value => {
_result.push(key + '=' + _value)
})
break;
case 'comma':
// 结果: ids=1,2,3
let commaStr = "";
value.forEach(_value => {
commaStr += (commaStr ? "," : "") + _value;
})
_result.push(key + '=' + commaStr)
break;
default:
value.forEach(_value => {
_result.push(key + '[]=' + _value)
})
}
} else {
_result.push(key + '=' + value)
}
}
return _result.length ? prefix + _result.join('&') : ''
}
export default queryParams;