Question

我在wordpress网站上有一个带有文本字段的表单，用于填写电子邮件地址，如下所示：

<div class="tnp-field tnp-field-email"><label>Email</label><input class="tnp-email" type="email" name="ne" required></div>

我可以从get参数（www.domain.com/?email=test@mail.com）获取电子邮件地址，如下所示：

<script type='text/javascript'>
function getUrlVars() {
    var vars = {};
    var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
        vars[key] = value;
    });
    return vars;
}

function getUrlParam(parameter, defaultvalue){
    var urlparameter = defaultvalue;
    if(window.location.href.indexOf(parameter) > -1){
        urlparameter = getUrlVars()[parameter];
        }
    return urlparameter;
}

var emailtxt = getUrlParam('email','');

如何用 emailtxt 填充文本字段？

Answer 1

您只需设置输入字段（HTMLInputElement.value = "value"）的值即可。

document.querySelector("input[name=ne]").value = getUrlParam('email','');

<div class="tnp-field tnp-field-email"><label>Email</label><input class="tnp-email" type="email" name="ne" required></div>
<script type='text/javascript'>
function getUrlVars() {
    var vars = {};
    var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
        vars[key] = value;
    });
    return vars;
}

function getUrlParam(parameter, defaultvalue){
    var urlparameter = defaultvalue;
    if(window.location.href.indexOf(parameter) > -1){
        urlparameter = getUrlVars()[parameter];
    }
    return urlparameter;
}

var emailtxt = getUrlParam('email','');
 console.log(emailtxt);
document.querySelector('input[name=ne]').value = emailtxt;
</script>

Answer 2

您可以尝试DOM ID选择器：

<input class="tnp-email" type="email" name="ne" id="yourId" required>

document.getElementById("yourId").innerHTML = "Your text";

Answer 3

您可以像这样使用DOM类名称选择器：

 var x = document.getElementsByClassName("tnp-email");
 x[0].value = "Your value";

如何使用javascript将文本输入文本字段

3 个答案: