我正在尝试使用pureJS验证多组单选按钮。基本上我的客户有一组约50个问题,每个问题都有4个单选按钮,可以用来挑选4个答案中的1个。
他们不想使用jQuery,但是pureJS,当只有一个问题时,我已经得到了以下工作,但是当有多个问题时,不会有任何帮助。
document.getElementById("submit_btn").addEventListener("click", function(event){
var all_answered = true;
var inputRadios = document.querySelectorAll("input[type=radio]")
for(var i = 0; i < inputRadios.length; i++) {
var name = inputRadios[i].getAttribute("name");
if (document.getElementsByName(name)[i].checked) {
return true;
var all_answered = true;
} else {
var all_answered = false;
}
}
if (!all_answered) {
alert("Some questiones were not answered. Please check all questions and select an option.");
event.preventDefault();
}
});
这些问题都是这样的 -
<div class="each-question">
<div class="unanswered-question">
<div class="question-text">
<div class="number">33</div>
<div class="text">
<p>Troubleshoot technology issues.</p>
</div>
</div>
<div class="options" id="ans_285">
<div class="radio-button">
<input type="radio" value="3" id="ans33op1" name="ans_285">
<label for="ans33op1" class="radio-label">Very Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="2" id="ans33op2" name="ans_285">
<label for="ans33op2" class="radio-label">Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="1" id="ans33op3" name="ans_285" class="custom">
<label for="ans33op3" class="radio-label"> Slightly Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="0" id="ans33op4" name="ans_285">
<label for="ans33op4" class="radio-label"> Not Interested</label>
</div>
</div>
</div>
这是客户端使用的原始jQuery,现在必须是pureJS
jQuery(document).ready(function () {
jQuery("#question_list").submit(function () {
var all_answered = true;
jQuery("input:radio").each(function () {
var name = jQuery(this).attr("name");
if (jQuery("input:radio[name=" + name + "]:checked").length == 0) {
all_answered = false;
}
});
if (!all_answered) {
alert("Some questiones were not answered. Please check all questions and select an option.");
return false;
}
});
});
答案 0 :(得分:0)
for
条款中的所有内容都没有意义。这就是原因:
由于你已经拥有inputRadios
,所以没有任何意义并获取他们的名字,然后使用它来按名称获取元素,因为你已经拥有它们。
由于您使用return true
,因此功能退出,其后的所有内容都会被忽略。
不是更新现有的all_answered
变量,而是创建一个新的本地变量,一旦当前迭代结束就会丢失。
你应该做什么:
不是获取所有输入,而是获取所有答案,包含每个答案的输入的div.options
元素,并迭代这些元素。
然后,使用答案的id
,因为它与输入的名称相同,以获取相关输入。
使用some
确保组中有选中的输入。然后,检查是否没有并停止循环。您找到了一个悬而未决的问题。
<强>段:强>
document.getElementById("submit_btn").addEventListener("click", function(event) {
var
/* Create a flag set by default to true. */
all_answered = true,
/* Get all answers. */
answers = document.querySelectorAll(".options[id ^= ans_]");
/* Iterate over every answer. */
for (var i = 0; i < answers.length; i++) {
var
/* Use the id of the answer to get its radiobuttons. */
radios = document.querySelectorAll("[name = " + answers[i].id + "]"),
/* Save whether there is a checked input for the answer. */
hasChecked = [].some.call(radios, function(radio) {
return radio.checked;
});
/* Check whether there is a checked input for the answer or not. */
if (!hasChecked) {
/* Set the all_answered flag to false and break the loop. */
all_answered = false;
break;
}
}
/* Check whether not all answers have been answered. */
if (!all_answered) {
console.log("Some questions were not answered...");
} else {
console.log("All questions are answered!");
}
});
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.question { display: inline-block }
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<div class="question">
<div class="text">
<p>Troubleshoot technology issues.</p>
</div>
<div class="options" id="ans_285">
<div class="radio-button">
<input type="radio" value="3" id="ans33op1" name="ans_285">
<label for="ans33op1" class="radio-label">Very Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="2" id="ans33op2" name="ans_285">
<label for="ans33op2" class="radio-label">Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="1" id="ans33op3" name="ans_285" class="custom">
<label for="ans33op3" class="radio-label">Slightly Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="0" id="ans33op4" name="ans_285">
<label for="ans33op4" class="radio-label">Not Interested</label>
</div>
</div>
</div>
<div class="question">
<div class="text">
<p>Troubleshoot technology issues.</p>
</div>
<div class="options" id="ans_286">
<div class="radio-button">
<input type="radio" value="3" id="ans34op1" name="ans_286">
<label for="ans34op1" class="radio-label">Very Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="2" id="ans34op2" name="ans_286">
<label for="ans34op2" class="radio-label">Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="1" id="ans34op3" name="ans_286" class="custom">
<label for="ans34op3" class="radio-label">Slightly Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="0" id="ans34op4" name="ans_286">
<label for="ans34op4" class="radio-label">Not Interested</label>
</div>
</div>
</div>
<div class="question">
<div class="text">
<p>Troubleshoot technology issues.</p>
</div>
<div class="options" id="ans_287">
<div class="radio-button">
<input type="radio" value="3" id="ans35op1" name="ans_287">
<label for="ans35op1" class="radio-label">Very Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="2" id="ans35op2" name="ans_287">
<label for="ans35op2" class="radio-label">Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="1" id="ans35op3" name="ans_287" class="custom">
<label for="ans35op3" class="radio-label">Slightly Interested</label>
</div>
<div class="radio-button">
<input type="radio" value="0" id="ans35op4" name="ans_287">
<label for="ans35op4" class="radio-label">Not Interested</label>
</div>
</div>
</div>
<button id="submit_btn">Submit</button>
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答案 1 :(得分:0)
不确定该副本是否只是一个问题,但您的return true
循环中有一个for
,如果只有一个回答,则会导致整个函数返回true 。删除它会有所帮助。
忽略这一点,你的解决方案有点笨拙,因为它会单独循环遍历页面上的每一个输入,如果没有取消选中每个单选按钮,则会将其标记为假。
这是一种不同的方法。基本上,获取所有单选按钮,然后按问题将它们分组到数组中。然后,循环遍历每个阵列并检查每个组中是否至少有一个被回答。
document.querySelector('form').addEventListener('submit', e => {
// Get all radio buttons, convert to an array.
const radios = Array.prototype.slice.call(document.querySelectorAll('input[type=radio]'));
// Reduce to get an array of radio button sets
const questions = Object.values(radios.reduce((result, el) =>
Object.assign(result, { [el.name]: (result[el.name] || []).concat(el) }), {}));
// Loop through each question, looking for any that aren't answered.
const hasUnanswered = questions.some(question => !question.some(el => el.checked));
if (hasUnanswered) {
console.log('Some unanswered');
} else {
console.log('All set');
}
e.preventDefault(); // just for demo purposes... normally, just put this in the hasUnanswered part
});
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<form action="#">
<div>
<label><input type="radio" name="a" /> A</label>
<label><input type="radio" name="a" /> B</label>
<label><input type="radio" name="a" /> C</label>
<label><input type="radio" name="a" /> D</label>
</div>
<div>
<label><input type="radio" name="b" /> A</label>
<label><input type="radio" name="b" /> B</label>
<label><input type="radio" name="b" /> C</label>
<label><input type="radio" name="b" /> D</label>
</div>
<button type="submit">Submit</button>
</form>
&#13;
首先,我得到了所有带有收音机类型的收音机按钮(如果有其他收音机那样,我就不会打扰他们)。
然后,我使用NodeList
将querySelectorAll()
返回的Array
转换为Array.prototype.slice.call()
,然后将其NodeList
。{/ p>
之后,我使用reduce()
将问题分组在一起。我将它作为一个以元素名称为关键字的数组(因为我知道它们必须如何分组)。在减少之后,因为我并不真正关心它是一个带密钥的对象,所以我只使用Object.values()
来获取数组。
之后,我在问题集上使用some()
。如果返回true,则表示我至少有一个未回答的问题。
最后,在some()
内,我在问题的各个单选按钮上做了另一个。为此,我想返回!some()
,因为如果没有至少一个被回答,那么我应该总体上返回真实(我至少有一个问题没有回答)。
上面有点冗长。这个更简洁,是我可能在我自己的代码中使用的:
document.querySelector('form').addEventListener('submit', e => {
if (Object.values(
Array.prototype.reduce.call(
document.querySelectorAll('input[type=radio]'),
(result, el) =>
Object.assign(result, { [el.name]: (result[el.name] || []).concat(el) }),
{}
)
).some(q => !q.some(el => el.checked))) {
e.preventDefault();
console.log('Some questions not answered');
}
});
&#13;
<form action="#">
<div>
<label><input type="radio" name="a" /> A</label>
<label><input type="radio" name="a" /> B</label>
<label><input type="radio" name="a" /> C</label>
<label><input type="radio" name="a" /> D</label>
</div>
<div>
<label><input type="radio" name="b" /> A</label>
<label><input type="radio" name="b" /> B</label>
<label><input type="radio" name="b" /> C</label>
<label><input type="radio" name="b" /> D</label>
</div>
<button type="submit">Submit</button>
</form>
&#13;
答案 2 :(得分:0)
以下是简化版本,但应该有足够的代码让您朝着正确的方向前进。
var answer = [];
function checkAnswerCount(e) {
// for the answer ids
var i = 0, max = answer.length;
// for the radios
var j = 0; rMax = 0;
// And a few extras
var tmp = null, answerCount = 0;
for(;i<max;i++) {
tmp = document.getElementsByName(answer[i]);
rMax = tmp.length;
for(j=0;j<rMax;j++) {
if (tmp[j].checked) {
answerCount++;
break;
}
}
}
if (answerCount == answer.length) {
console.log("All questions have an answer, submit the form");
} else {
console.log("You need to answer all the questions");
}
}
window.onload = function() {
// each answer block is surrounded by the "options" class,
// so we use that to collect the ids of the raido groups
var a = document.querySelectorAll(".options");
var i = 0, max = a.length;
for(;i<max;i++) {
answer.push(a[i].id);
}
// And we want to check if all the answers have been answered
// when the user tries to submit...
var s = document.getElementById("submitAnswers");
if (s) {
s.addEventListener("click",checkAnswerCount,false);
}
}
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<p>Question 1.</p>
<div class="options" id="ans_1">
<label><input type="radio" name="ans_1" value="a1_1" /> Answer 1, op1</label>
<label><input type="radio" name="ans_1" value="a1_2" /> Answer 1, op2</label>
</div>
<p>Question 2.</p>
<div class="options" id="ans_2">
<label><input type="radio" name="ans_2" value="a2_1" /> Answer 2, op1</label>
<label><input type="radio" name="ans_2" value="a2_2" /> Answer 2, op2</label>
</div>
<p>Question 3.</p>
<div class="options" id="ans_3">
<label><input type="radio" name="ans_3" value="a3_1" /> Answer 3, op1</label>
<label><input type="radio" name="ans_3" value="a3_2" /> Answer 3, op2</label>
</div>
<button id="submitAnswers">Submit / check</button>
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