javascript - 无法从数据属性解析 JSON

Question

我当前正在尝试从数据属性解析 JSON，但收到错误:

Uncaught SyntaxError: Unexpected token � in JSON at position 0

这是我的代码:

jQuery( document ).ready( function ( $ ) {
	let variations = $( "span" ).data( "variations" );

	$( JSON.parse( variations ) ).each( function ( index, variation ) {
		console.log( variation );
	} );
} );

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<span data-variations='["\ud83d\udc36","\ud83d\udc31"]'></span>

我不明白。我正在使用此函数在 PHP 中打印 JSON，但我陷入了困境:

<span data-variations='<?= esc_html( json_encode( $variations ) ) ?>'></span>

Answer 1

您遇到此问题是因为 variations 已经具有解析值 as said in the doc :

When a string starts with '{' or '[', then jQuery.parseJSON is used to parse it

jQuery( document ).ready( function ( $ ) {
	let variations = $( "span" ).data( "variations" );

	$( variations ).each( function ( index, variation ) {
		console.log( variation );
	} );
} );

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<span data-variations='["\ud83d\udc36","\ud83d\udc31"]'></span>