我在使用CSS类运行javascript hide/showdiv时遇到问题，所有div的初始状态都是隐藏的，而不是当我在searchBar中键入配方名称时(就像div ribs一样(，它只显示ribsdiv，到目前为止它还在工作，但当我清除searchBar时，它显示所有div，而不是隐藏所有div。
function search_recipe() {
let input = document.getElementById('search').value
input = input.toLowerCase();
let recipeCard = document.getElementsByClassName('recipe__card');
for (i = 0; i < recipeCard.length; i++) {
if (recipeCard[i].textContent.toLowerCase().includes(input)) {
recipeCard[i].style.display = "block";
} else if (!recipeCard[i].textContent.toLowerCase().includes(input) && recipeCard[i].style.display === "block") {
recipeCard[i].style.display = "none";
}
}
}.recipe__container {
padding-top: 1rem;
display: flex;
flex-wrap: wrap;
gap: 3rem;
}
.recipe__filters {
display: flex;
justify-content: center;
align-items: center;
column-gap: .75rem;
flex-direction: column;
}
.recipe__item {
cursor: pointer;
color: var(--title-color);
padding: .25rem .75rem;
font-weight: var(--font-medium);
border-radius: .5rem;
margin-bottom: 2rem;
text-align: center;
}
.recipe__items {
cursor: pointer;
color: var(--title-color);
font-weight: var(--font-medium);
border-radius: .5rem;
margin-bottom: 2rem;
text-align: center;
}
.recipe__card {
box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
padding: 1rem;
border-radius: 1rem;
display: none;
}
.recipe__img {
border-radius: 1rem;
margin-bottom: var(--mb-1-25);
width: 230px;
}
.recipe-title-item {
font-size: var(--normal-font-size);
font-weight: var(--font-medium);
margin-bottom: var(--mb-0-75);
}
.hide_categories {
display: none;
transition: all ease-in-out;
}
.categories {
display: grid;
padding-bottom: 2rem;
transition: all ease-in-out;
grid-template-columns: repeat(4, max-content);
}
#categories-button {
z-index: 9;
}
.cat {
display: flex;
align-items: center;
margin-bottom: 1rem;
}
#categories-button {
margin-left: 1rem;
cursor: pointer;
font-size: 1.5rem;
}
.active-recipe {
background-color: var(--first-color);
color: var(--white-color);
}
input[type="text"],
input[type="email"],
textarea[type="text"],
select {
padding-left: 1rem;
}
.recipe {
display: block;
}<h2 class="section__title">Recipe</h2>
<div class="recipe__filters">
<input type="text" onkeyup="search_recipe()" placeholder="search" id="search" class="section__search"></input>
<div class="cat">
<h3>Categories</h3>
<i class="uil uil-arrow-right" id="categories-button"></i>
</div>
<div class="hide_categories" id="h_categories">
<span class="all recipe__item active-recipe " data-filter='all'>All </span>
<span class="recipe__item" data-filter='.breakfast'>Breakfast</span>
<span class="recipe__item" data-filter='.dessert'>dessert</span>
<span class="recipe__item" data-filter='.burgersandwiches'>Burger & Sandwiches</span>
</div>
</div>
<div class="recipe__container container">
<!-- <div class="recipe__card mix ">
<img src="./asset/img" alt="" class="recipe__img">
<h3 class="recipe-title-item"></h3>
<a href="#" class="recipe__button">
More details <i class='uil uil-angle-right-b recipe__icon'></i>
</a>
</div> -->
<div class="recipe__card mix">
<img src="./asset/img/ramen_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Helllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix">
<img src="./asset/img/burrito_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">aelllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix">
<img src="./asset/img/pasta_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix burgersandwiches">
<img src="./asset/img/burger_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix">
<img src="./asset/img/chips_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/raspberry_brownies_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/steaks_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Zelllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/shrimp_pasta_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/ribs_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Ribs</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
</section>function search_recipe() {
let input = document.getElementById('search').value
input = input.toLowerCase();
let recipeCard = document.getElementsByClassName('recipe__card');
for (i = 0; i < recipeCard.length; i++) {
if (recipeCard[i].textContent.toLowerCase().includes(input)) {
recipeCard[i].style.display = "block";
} else if (!recipeCard[i].textContent.toLowerCase().includes(input) && recipeCard[i].style.display === "block") {
recipeCard[i].style.display = "none";
}
if(document.getElementById('search').value==""){
recipeCard[i].style.display = "none";
}
}
}.recipe__container {
padding-top: 1rem;
display: flex;
flex-wrap: wrap;
gap: 3rem;
}
.recipe__filters {
display: flex;
justify-content: center;
align-items: center;
column-gap: .75rem;
flex-direction: column;
}
.recipe__item {
cursor: pointer;
color: var(--title-color);
padding: .25rem .75rem;
font-weight: var(--font-medium);
border-radius: .5rem;
margin-bottom: 2rem;
text-align: center;
}
.recipe__items {
cursor: pointer;
color: var(--title-color);
font-weight: var(--font-medium);
border-radius: .5rem;
margin-bottom: 2rem;
text-align: center;
}
.recipe__card {
box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
padding: 1rem;
border-radius: 1rem;
display: none;
}
.recipe__img {
border-radius: 1rem;
margin-bottom: var(--mb-1-25);
width: 230px;
}
.recipe-title-item {
font-size: var(--normal-font-size);
font-weight: var(--font-medium);
margin-bottom: var(--mb-0-75);
}
.hide_categories {
display: none;
transition: all ease-in-out;
}
.categories {
display: grid;
padding-bottom: 2rem;
transition: all ease-in-out;
grid-template-columns: repeat(4, max-content);
}
#categories-button {
z-index: 9;
}
.cat {
display: flex;
align-items: center;
margin-bottom: 1rem;
}
#categories-button {
margin-left: 1rem;
cursor: pointer;
font-size: 1.5rem;
}
.active-recipe {
background-color: var(--first-color);
color: var(--white-color);
}
input[type="text"],
input[type="email"],
textarea[type="text"],
select {
padding-left: 1rem;
}
.recipe {
display: block;
}<h2 class="section__title">Recipe</h2>
<div class="recipe__filters">
<input type="text" onkeyup="search_recipe()" placeholder="search" id="search" class="section__search"></input>
<div class="cat">
<h3>Categories</h3>
<i class="uil uil-arrow-right" id="categories-button"></i>
</div>
<div class="hide_categories" id="h_categories">
<span class="all recipe__item active-recipe " data-filter='all'>All </span>
<span class="recipe__item" data-filter='.breakfast'>Breakfast</span>
<span class="recipe__item" data-filter='.dessert'>dessert</span>
<span class="recipe__item" data-filter='.burgersandwiches'>Burger & Sandwiches</span>
</div>
</div>
<div class="recipe__container container">
<!-- <div class="recipe__card mix ">
<img src="./asset/img" alt="" class="recipe__img">
<h3 class="recipe-title-item"></h3>
<a href="#" class="recipe__button">
More details <i class='uil uil-angle-right-b recipe__icon'></i>
</a>
</div> -->
<div class="recipe__card mix">
<img src="./asset/img/ramen_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Helllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix">
<img src="./asset/img/burrito_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">aelllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix">
<img src="./asset/img/pasta_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix burgersandwiches">
<img src="./asset/img/burger_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix">
<img src="./asset/img/chips_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/raspberry_brownies_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/steaks_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Zelllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/shrimp_pasta_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Telllllllo</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
<div class="recipe__card mix ">
<img src="./asset/img/ribs_recipe.jpeg" alt="" class="recipe__img">
<h3 class="recipe-title-item">Ribs</h3>
<a href="#" class="blog__button">
More details <i class='uil uil-angle-right-b blog__icon'></i>
</a>
</div>
</section>如果我很理解你的问题，那么当输入被清除时，你正试图删除所有div(将显示更改为无(。但请记住，输入是一个空字符串，所有div都包含该字符串，因此第一个if为true。若要克服此问题，请在input=''时消除实例。
for (i = 0; i < recipeCard.length; i++) {
// added this
if( input == ''){
recipeCard[i].style.display = "none";
}
// end
else if (recipeCard[i].textContent.toLowerCase().includes(input)) {
recipeCard[i].style.display = "block";
} else if (!recipeCard[i].textContent.toLowerCase().includes(input) && recipeCard[i].style.display === "block") {
recipeCard[i].style.display = "none";
}
}
满足您需求的一种方法是检查输入值的长度。如果等于0，则隐藏配方卡。请参阅下面的Js片段。
if(input.length <= 0) {
recipeCard[i].style.display = "none";
}
if (input == "") {
Array.from(recipeCard).forEach(card => {
card.style.display = "none"
});
}