30-seconds-of-code/snippets/TagInput.md

title, tags

title	tags
Tag Input	visual,input,intermediate

Renders an input field to add tags.

• Define a TagInput component and use React.useState() hook to initialize an empty array of tags.
• Use Array.prototype.map on collected nodes to render the list of tags.
• Define addTab, which will be executed on pressing Enter key.
• addTab uses the setTabs to add the new tag using the spread operator to prepend the existing tags and adds the new tag at the end of the tags array.
• Define removeTab, which will executed on clicking the delete icon in the tag.
• Use the Array.prototyp.filter in removeTab to remove the tag using the index of the tag to filter it out from tags array.

.tag-input {
	display: flex;
	align-items: flex-start;
	flex-wrap: wrap;
	min-height: 48px;
	width: 480px;
	padding: 0 8px;
	border: 1px solid rgb(214, 216, 218);
	border-radius: 6px;
}

.tag-input input {
	flex: 1;
	border: none;
	height: 46px;
	font-size: 14px;
	padding: 4px 0 0 0;
	&:focus {
		outline: transparent;
	}
}

#tags {
	display: flex;
	flex-wrap: wrap;
	padding: 0;
	margin: 8px 0 0 0;
}

.tag {
	width: auto;
	height: 32px;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	padding: 0 8px;
	font-size: 14px;
	list-style: none;
	border-radius: 6px;
	margin: 0 8px 8px 0;
	background: #0052cc;
}

.tag span {
	margin-top: 3px;
}

.tag i {
	font-size: 14px;
	margin-left: 8px;
	color: #0052cc;
	border-radius: 50%;
	background: #fff;
	cursor: pointer;
}

function TagInput(props) {
	const [tags, setTags] = React.useState(['NodeJs', 'MongoDB'])
	const removeTags = indexToRemove => {
		setTags([...tags.filter((_, index) => index !== indexToRemove)])
	}
	const addTags = event => {
		if (event.target.value !== '') {
			setTags([...tags, event.target.value])
			event.target.value = ''
		}
	}
	return (
		<div className="tags-input">
			<ul id="tags">
				{tags.map((tag, index) => (
					<li key={index} className="tag">
						<span>{tag}</span>
						<i
							className="material-icons"
							onClick={() => removeTags(index)}
						>
							close
						</i>
					</li>
				))}
			</ul>
			<input
				type="text"
				onKeyUp={event =>
					event.key === 'Enter' ? addTags(event) : null
				}
				placeholder="Press enter to add tags"
			/>
		</div>
	)
}

ReactDOM.render(<TagInput />, document.getElementById("root"));