[英]How to remove a parameter from a url?
我使用了以下代碼,因此可以將多個參數添加到 url
<script>
function setParam(name, value) {
var l = window.location;
/* build params */
var params = {};
var x = /(?:\??)([^=&?]+)=?([^&?]*)/g;
var s = l.search;
for(var r = x.exec(s); r; r = x.exec(s))
{
r[1] = decodeURIComponent(r[1]);
if (!r[2]) r[2] = '%%';
params[r[1]] = r[2];
}
/* set param */
params[name] = encodeURIComponent(value);
/* build search */
var search = [];
for(var i in params)
{
var p = encodeURIComponent(i);
var v = params[i];
if (v != '%%') p += '=' + v;
search.push(p);
}
search = search.join('&');
/* execute search */
l.search = search;
}
</script>
<a href="javascript:setParam('priceMin', 300);">add priceMin=300</a>
<a href="javascript:setParam('priceMin', 600);">add priceMin=600</a>
<a href="javascript:setParam('MaxDistance', 300);">add MaxDistance=300</a>
這取自問題: 如何向 URL 添加參數?
但是需要添加什么額外的腳本,所以如果再次單擊相同的超鏈接,它會刪除 url 中的參數? 在這種情況下是 '?priceMin=300'
Javascript 已經有 URL 對象。如果你想要這樣的東西,你可以 append 參數。
const newUrl = new URL(window.location.href);
function setParam(name, value, option = 'add') {
var paramexist = newUrl.searchParams.has(name);
if (option == 'remove') {
newUrl.searchParams.delete(name);
return newUrl;
}
(!paramexist) ? newUrl.searchParams.append(name, value) : newUrl.searchParams.set(name, value);
return newUrl;
}
console.log(setParam('priceMin', 300));
console.log(setParam('priceMin', 300,'remove'))
您可以嘗試添加一個if
塊,如果它已經存在則清除搜索,或者如果搜索為空,則允許添加參數:
function setParam(name, value) {
var l = window.location;
if (l.search) {
l.search = ''
return
}
...
}
如果您有多個參數,Hero Qu 的答案將重置整個參數列表。
這樣做的方法是檢查該特定參數是否存在然后刪除它,否則添加它。
我在下面修改了您的代碼以考慮多個參數。
<script>
function setParam(name, value) {
var l = window.location;
/* build params */
var params = {};
var x = /(?:\??)([^=&?]+)=?([^&?]*)/g;
var s = l.search;
for (var r = x.exec(s); r; r = x.exec(s)) {
r[1] = decodeURIComponent(r[1]);
if (!r[2]) r[2] = '%%';
params[r[1]] = r[2];
}
/** Check to see if the param exist already
Delete if it exist, set it, if it doesn't
**/
if (params[name] && value == params[name]) {
delete params[name];
} else if (params[name] && value != params[name]) {
delete params[name];
params[name] = encodeURIComponent(value);
} else {
params[name] = encodeURIComponent(value);
}
/* set param */
/* build search */
var search = [];
for (var i in params) {
var p = encodeURIComponent(i);
var v = params[i];
if (v != '%%') p += '=' + v;
search.push(p);
}
search = search.join('&');
/* execute search */``
l.search = search;
}
</script>
<a href="javascript:setParam('priceMin', 200);">add priceMin=200</a>
<br />
<a href="javascript:setParam('priceMin', 300);">add priceMin=300</a>
<br />
<a href="javascript:setParam('priceMax', 400);">add priceMax=400</a>
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