假设我有以下 SVG 和 jQuery:
<g id="test">
<rect>
<text>demo</text>
</g>
$('#test').filter('text').each(function(){
// do something
});
filter 函数不适用于 SVG,可能是因为 jQuery 是为 DOM 操作而设计的,而不是命名空间的 SVG。
但是我怎样才能使 jQuery 的过滤器功能正确地接受 SVG?
Sizzle.filter = function( expr, set, inplace, not ) {
var match, anyFound,
old = expr,
result = [],
curLoop = set,
isXMLFilter = set && set[0] && Sizzle.isXML( set[0] );
while ( expr && set.length ) {
for ( var type in Expr.filter ) {
if ( (match = Expr.leftMatch[ type ].exec( expr )) != null && match[2] ) {
var found, item,
filter = Expr.filter[ type ],
left = match[1];
anyFound = false;
match.splice(1,1);
if ( left.substr( left.length - 1 ) === "\\" ) {
continue;
}
if ( curLoop === result ) {
result = [];
}
if ( Expr.preFilter[ type ] ) {
match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );
if ( !match ) {
anyFound = found = true;
} else if ( match === true ) {
continue;
}
}
if ( match ) {
for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
if ( item ) {
found = filter( item, match, i, curLoop );
var pass = not ^ !!found;
if ( inplace && found != null ) {
if ( pass ) {
anyFound = true;
} else {
curLoop[i] = false;
}
} else if ( pass ) {
result.push( item );
anyFound = true;
}
}
}
}
if ( found !== undefined ) {
if ( !inplace ) {
curLoop = result;
}
expr = expr.replace( Expr.match[ type ], "" );
if ( !anyFound ) {
return [];
}
break;
}
}
}
// Improper expression
if ( expr === old ) {
if ( anyFound == null ) {
Sizzle.error( expr );
} else {
break;
}
}
old = expr;
}
return curLoop;
};