如何在 javascript 中循环直到满足条件并将结果添加到数组中？

Question

I need to push two key/value pairs to an array based on the different conditions.

Condition for the first key/value : only paragraph starting with the number.

Condition for the second key/value : all paragraphs after the first key/value pair (until the next paragraph starting with number).

Here is the html example:

<div class="someclass">
    <p><strong>1. Some text</strong></p>
    <p>Some text related to 1.</p>
    <p>Some other <a href="/someurl"><strong> text</strong></a> related to 1.</p>
    <p><strong>2. Some other text</strong></p>
    <p>Some text related to 2.</p>
    <p><strong>3. Can you send me a catalog?</strong></p>
    ...
</div>

I am able to get only one paragraph for the second key/value pair with this javascript code:

var array = [];
var allParagraphs = document.querySelectorAll("someclass p");
for (i = 0; i < allParagraphs.length; i++) {
    if (/^\d/.test(allParagraphs[i].innerText) === true) {
        array.push({
            "key1": allParagraphs[i].innerText,
            "customText": {
                "key2": allParagraphs[i + 1].innerText
            }
        });
    }
}

The output I get is something like:

[{key1: "1. Some text", customText: {key2: "Some text related to 1."}},{key1: "2. Some text", customText: {key2: "Some text related to 2."}},{...}]

And I need to get something like this:

[{key1: "1. Some text", customText: {key2: "Some text related to 1. Some other text related to 1."}},{key1: "2. Some text", customText: {key2: "Some text related to 2."}},{...}]

Answer 1

Does this work for you?

You can filter out empty key2 if you need

 const vals = [...document.querySelectorAll(".someclass p")].reduce((acc, elem) => { const first = elem.firstChild; if (first.tagName === "STRONG" && first.textContent.match(/^\d+\./)) { acc.push({ "key1": elem.textContent, "customtext": { "key2": [""] } }) } else acc[acc.length - 1].customtext.key2[0] += elem.textContent; return acc }, []) console.log(vals)

 <div class="someclass"> <p><strong>1. Some text</strong></p> <p>Some text related to 1.</p> <p>Some other <a href="/someurl"><strong> text</strong></a> related to 1.</p> <p><strong>2. Some other text</strong></p> <p>Some text related to 2.</p> <p><strong>3. Can you send me a catalog?</strong></p> </div>

ES5

 const elems = document.querySelectorAll(".someclass p"); const acc = []; for (let i=0;i<elems.length;i++) { const first = elems[i].firstChild; if (first.tagName === "STRONG" && first.textContent.match(/^\d+\./)) { acc.push({ "key1": elems[i].textContent, "customtext": { "key2": [""] } }) } else acc[acc.length - 1].customtext.key2[0] += elems[i].textContent; } console.log(acc)

 <div class="someclass"> <p><strong>1. Some text</strong></p> <p>Some text related to 1.</p> <p>Some other <a href="/someurl"><strong> text</strong></a> related to 1.</p> <p><strong>2. Some other text</strong></p> <p>Some text related to 2.</p> <p><strong>3. Can you send me a catalog?</strong></p> </div>

Answer 2

I think the problem is that this:

for (i = 0; i < allParagraphs.length; i++) {
    if (/^\d/.test(allParagraphs[i].innerText) === true) {

Should be this:

for (i = 0; i < allParagraphs.length; i++) {
    while (/^\d/.test(allParagraphs[i].innerText) === true) {

Basically, the IF statement runs once and then proceeds to the next for loop, while the WHILE is running while the condition inthe parentheses is true