问题描述
在我的代码中，我正在搜索一些单词并使用 mark 标记突出显示它们。
我想使用下一个按钮滚动到标记标签中包含的每个突出显示的单词，但我不确定如何准确进行。
我试过了：
// select btn id to execute function
$('#btnNext').click(test);
//function
function test() {
//obtain a nodeList
let pickHighlights = document.querySelectorAll('mark');
// convert nodeList to array
let pHtest= Array.from(pickHighlights);
// apply scroll to highlighted tags
pHtest.forEach(function(){
//scroll to highlighted mark
var offset = $('.timeline-compendium__content').offset().top;
window.scrollTo(0,offset);
//scroll to next one
// ???
})
}
解决方法
您可以存储当前引用的元素的索引，下面的示例将其存储到变量 i。
$(document).ready(function () {
// console.log(occurrences);
$(document).on("click","#findWord",function (e) {
let occurrences = [];
e.preventDefault();
// clear();
let x = document.querySelector("#searchedWord").value;
let error = document.querySelector("#message");
if (x == "") {
error.style.display = "block";
error.style.color = "red";
} else {
error.style.display = "none";
highlightWord();
displayOcc();
}
// let clickInput = document.querySelector('#searchedWord');
let clickClear = document.querySelector("#clear");
// Make clear button to appear on input field click
// clickInput.addEventListener('input',function(){
// clickClear.style.display = 'block';
// });
clickClear.addEventListener("click",clear);
function clear() {
// get the search term from the input
let clickInput = document.querySelector("#searchedWord");
clickInput.value = "";
var spans = $(".reports-list-item__title--compendium > mark");
// console.log(spans);
spans.each(function () {
spans.contents().unwrap();
});
occurrences.splice(0,occurrences.length);
// reset our labels
$("#count").html("");
$("#current").html("");
$(".timeline-compendium__content").collapse("hide");
$(".timeline-type .timeline-type__content").collapse("hide");
}
function highlightWord() {
// create a regex from our term
const word = document.getElementById("searchedWord").value;
const r = new RegExp("(" + word + ")","ig");
$(".reports-list-item__title--compendium").each(function (i) {
if ($(this).text().match(r)) {
// console.log($(this).text().match(r));
// get all the matches
var matches = $(this).text().match(r);
// console.log(matches);
// loop through them
$.each(matches,function () {
// push the index of this section onto the array
occurrences.push(i);
// console.log(occurrences);
});
// wrap each found search term with our `found` span to highlight it
$(this).html($(this).text().replace(r,"<mark>$&</mark>"));
$(this).closest(".timeline-compendium__content").collapse("show");
// scroll to highlighted word(s)
// $(this).closest(".timeline-compendium__content")[0].scrollIntoView();
$(this)
.closest(".timeline-type .timeline-type__content")
.collapse("show");
}
});
}
function displayOcc() {
let lengthOccurrences = occurrences.length;
console.log(
"Length (number) of occurrences is:" + " " + lengthOccurrences
);
let currViewMatch = Number(
document.querySelector("#current").textContent
);
console.log("Number of current viewed match is:" + " " + currViewMatch);
// if we are currently viewing a match,increment so we move to the next one
currViewMatch = currViewMatch > 0 ? currViewMatch + 1 : 0;
// if the incremented number is higher than the number of matches,reset it to 0
currViewMatch = currViewMatch > lengthOccurrences ? 1 : currViewMatch;
// if this is the first click and we found matches,set current to the first match
currViewMatch =
currViewMatch == 0 && lengthOccurrences > 0 ? 1 : currViewMatch;
let insertNbrOcc =
lengthOccurrences > 0 ? " of " + lengthOccurrences : " matches found";
// // set number of matches found
let count = document.querySelector("#count");
count.textContent = insertNbrOcc;
// // set number of currently viewed match
let nbrViewMatch = document.querySelector("#current");
nbrViewMatch.textContent = currViewMatch;
}
});
$("#btnNext").click(test);
let i = 0;
function test() {
let pickHighlights = document.querySelectorAll("mark");
var viewportOffset = pickHighlights[i].getBoundingClientRect();
// these are relative to the viewport
var top = viewportOffset.top;
window.scrollTo(0,top);
i++;
if (i >= pickHighlights.length) {
i = 0;
}
}
});.found {
background-color: yellow;
}
#labels {
margin-left: 15px;
font-size: 16px;
}
.timeline-compendium {
margin-left: 2rem;
}
.timeline-type__header {
width: 400px;
height: 50px;
background-color: rgb(46,177,100);
display: flex;
align-items: center;
justify-content: center;
color: white;
border: 1px solid white;
}
.timeline-type__header:hover {
color: white;
background-color: rgb(35,119,70);
}
#tab-content {
border: 1px solid red;
}
input[type="text"] {
width: 80%;
padding: 12px 20px;
margin: 8px 0;
box-sizing: border-box;
}
input#findWord {
background-color: rgb(248,211,3);
border: none;
color: black;
padding: 15px 32px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
}
#clear {
width: 25px;
height: 25px;
position: absolute;
top: 20px;
right: 150px;
line-height: 25px;
font-size: 14px;
padding-left: 8px;
font-weight: bold;
cursor: pointer;
color: #fff;
background-color: red;
border: none;
border-radius: 50%;
}
#message {
display: none;
font-size: 1em;
}
#btnNext {
margin-left: 0.5rem;
}
mark {
background-color: yellow !important;
}
.stickyBar {
position: sticky;
top: 0;
z-index: 1;
background-color: white;
}<html>
<head>
<link
href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
rel="stylesheet"
/>
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<div class="row stickyBar">
<div class="col-sm-12 mb-2">
<div id="searchForm" class="d-flex flex-column">
<label for="searchedWord">Search... </label>
<div class="col-sm-12 p-0 d-flex">
<input
type="text"
id="searchedWord"
placeholder="Search..."
aria-labelledby="searchedWord"
value="cool"
class="form-control form-control-lg"
/>
<button type="submit" id="findWord" class="btn btn-primary">
Search
</button>
<!-- next btn -->
<input type="button" id="btnNext" value="next" />
<div id="clear" role="button">X</div>
</div>
</div>
</div>
<div class="col-sm-6 mb-2">
<div id="labels">
<span id="current"></span>
<span id="count"></span>
<small role="alert" id="message" aria-hidden="true"
>Please enter a word to start searching</small
>
</div>
</div>
</div>
<div class="row">
<div class="col">
<section class="timeline-compendium">
<a
class="btn timeline-compendium__header"
data-toggle="collapse"
href="#introduction"
role="button"
aria-expanded="true"
aria-controls="introduction"
>
<div class="row align-items-center">
<div class="col-auto">1<sup>st</sup> collapsible item</div>
<div class="col"><span></span></div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
data-original-title="Collapse/expand"
></em
><span class="sr-only">Collapse/expand this item</span>
</div>
</div>
</a>
<div
class="timeline-compendium__content collapse"
id="introduction"
>
<div class="timeline-type">
<a
data-toggle="collapse"
href="#foreword"
role="button"
aria-expanded="false"
aria-controls="foreword"
>
<div class="row no-gutters align-items-center">
<div class="col">
<div
class="
timeline-type__header timeline-type__header--title
"
>
<div class="row align-items-center">
<div class="col-auto timeline-type__chapter">1</div>
<div class="col timeline-type__title">
First nested collapsible
</div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
></em
><span class="sr-only"
>Collapse/expand this item</span
>
</div>
</div>
</div>
</div>
</div>
</a>
<div class="timeline-type__content collapse" id="foreword">
<ul class="reports-list">
<li>
<a
href="#"
target="_blank"
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col-auto
reports-list-item__title
reports-list-item__title--compendium
"
>
First cool
</div>
<div class="reports-list-item__url">
<em
class="icon-url"
data-toggle="tooltip"
title="Link"
data-delay="400"
aria-hidden="true"
></em>
</div>
</a>
</li>
</ul>
</div>
</div>
</div>
</section>
<!-- section 2 -->
<section class="timeline-compendium">
<a
class="btn timeline-compendium__header collapsed"
data-toggle="collapse"
href="#titleA"
role="button"
aria-expanded="false"
aria-controls="titleA"
>
<div class="row align-items-center">
<div class="col-auto">2<sup>nd</sup></div>
<div class="col"><span>collapsible item</span></div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
data-original-title="Collapse/expand"
></em
><span class="sr-only">Collapse/expand this item</span>
</div>
</div>
</a>
<div class="timeline-compendium__content collapse" id="titleA">
<div class="timeline-type">
<a
class="accordion"
data-toggle="collapse"
href="#summary"
role="button"
aria-expanded="false"
aria-controls="summary"
class="collapsed"
>
<div class="row no-gutters align-items-center">
<div class="col">
<div
class="
timeline-type__header timeline-type__header--title
"
>
<div class="row align-items-center">
<div class="col-auto timeline-type__chapter">2</div>
<div class="col timeline-type__title">
Second nested collapsible
</div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
></em
><span class="sr-only"
>Collapse/expand this item</span
>
</div>
</div>
</div>
</div>
</div>
</a>
<div class="timeline-type__content collapse" id="summary">
<ul class="reports-list">
<li>
<a
href="#"
target="_blank"
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col-auto
reports-list-item__title
reports-list-item__title--compendium
"
>
Second cool
</div>
<div class="reports-list-item__url">
<em
class="icon-url"
data-toggle="tooltip"
title="Link"
data-delay="400"
aria-hidden="true"
></em>
</div>
</a>
</li>
</ul>
</div>
</div>
</div>
</section>
<!-- section 3 -->
<section class="timeline-compendium">
<a
class="btn timeline-compendium__header collapsed"
data-toggle="collapse"
href="#titleB"
role="button"
aria-expanded="false"
aria-controls="titleB"
>
<div class="row align-items-center">
<div class="col-auto">3<sup>rd</sup></div>
<div class="col"><span>collapsible item</span></div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
></em
><span class="sr-only">Collapse/expand this item</span>
</div>
</div>
</a>
<div class="timeline-compendium__content collapse" id="titleB">
<div class="timeline-type">
<a
data-toggle="collapse"
href="#chapterB0"
role="button"
aria-expanded="false"
aria-controls="chapterB0"
class="collapsed"
>
<div class="row no-gutters align-items-center">
<div class="col">
<div
class="
timeline-type__header timeline-type__header--title
"
>
<div class="row align-items-center">
<div class="col-auto timeline-type__chapter">3</div>
<div class="col timeline-type__title">
Third nested collapsible
</div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
></em
><span class="sr-only"
>Collapse/expand this item</span
>
</div>
</div>
</div>
</div>
</div>
</a>
<div class="timeline-type__content collapse" id="chapterB0">
<ul class="reports-list">
<li>
<a
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col-auto
reports-list-item__title
reports-list-item__title--nolink
"
>
No link
</div>
</a>
</li>
<li>
<a
href="#"
target="_blank"
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col-auto
reports-list-item__title
reports-list-item__title--compendium
"
>
Some content with link cool
</div>
<div class="reports-list-item__url">
<em
class="icon-url"
data-toggle="tooltip"
title="Link"
data-delay="400"
aria-hidden="true"
></em>
</div>
</a>
</li>
<li>
<a
href="#"
target="_blank"
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col-auto
reports-list-item__title
reports-list-item__title--compendium
"
>
Some content with link
</div>
<div class="reports-list-item__url">
<em
class="icon-url"
data-toggle="tooltip"
title="Link"
data-delay="400"
aria-hidden="true"
></em>
</div>
</a>
</li>
</ul>
</div>
</div>
<div class="timeline-type">
<a
data-toggle="collapse"
href="#chapterB2"
role="button"
aria-expanded="false"
aria-controls="chapterB2"
class="collapsed"
>
<div class="row no-gutters align-items-center">
<div class="col">
<div
class="
timeline-type__header timeline-type__header--title
"
>
<div class="row align-items-center">
<div class="col-auto timeline-type__chapter">4</div>
<div class="col timeline-type__title">
Fourth nested collapsible
</div>
<div class="col-auto">
<em
class="icon-arrow-down"
data-toggle="tooltip"
title="Collapse/expand"
data-delay="400"
aria-hidden="true"
></em
><span class="sr-only"
>Collapse/expand this item</span
>
</div>
</div>
</div>
</div>
</div>
</a>
<div class="timeline-type__content collapse" id="chapterB2">
<ul class="reports-list">
<li>
<a
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col
reports-list-item__title
reports-list-item__title--nolink
"
>
No link
</div>
</a>
</li>
<li>
<a
href="#"
class="reports-list-item reports-list-item--compendium"
>
<div
class="
col-auto
reports-list-item__title
reports-list-item__title--compendium
"
>
Some content with link
</div>
<div class="reports-list-item__url">
<em
class="icon-url"
data-toggle="tooltip"
title="Link"
data-delay="400"
aria-hidden="true"
></em>
</div>
</a>
</li>
</ul>
</div>
</div>
</div>
</section>
</div>
</div>
</div>
</body>
</html>