All files / src/internal/client/dom operations.js

98.62% Statements 143/145
100% Branches 27/27
85.71% Functions 6/7
98.58% Lines 139/141

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 1422x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3030x 3026x 3026x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 3030x 2x 2x 2x 10537x 10537x 2x 2x 2x 2x 2x 2x 2x 2x 7396x 7396x 3280x 3280x 7356x 41x 41x 3239x 3239x 3239x 2x 2x 2x 2x 2x 2x 2x 2x 5977x 3218x 3218x 3218x 2759x 2759x 2759x 5977x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2757x 2757x 2757x 2x 2x 2x 2x 2x 2x 2x 2x 2x 6774x 6774x 6774x 3704x 3704x 3070x 3070x 3070x 6774x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3068x 3068x 3068x 2x 2x 2x 2x 2x 2x 2x 11x 11x 2x 2x 2x 2x      
import { hydrate_anchor, hydrate_start, hydrating } from './hydration.js';
import { DEV } from 'esm-env';
import { init_array_prototype_warnings } from '../dev/equality.js';
import { current_effect } from '../runtime.js';
 
// export these for reference in the compiled code, making global name deduplication unnecessary
/** @type {Window} */
export var $window;
 
/** @type {Document} */
export var $document;
 
/**
 * Initialize these lazily to avoid issues when using the runtime in a server context
 * where these globals are not available while avoiding a separate server entry point
 */
export function init_operations() {
	if ($window !== undefined) {
		return;
	}
 
	$window = window;
	$document = document;
 
	var element_prototype = Element.prototype;
 
	// the following assignments improve perf of lookups on DOM nodes
	// @ts-expect-error
	element_prototype.__click = undefined;
	// @ts-expect-error
	element_prototype.__className = '';
	// @ts-expect-error
	element_prototype.__attributes = null;
	// @ts-expect-error
	element_prototype.__e = undefined;
 
	if (DEV) {
		// @ts-expect-error
		element_prototype.__svelte_meta = null;
 
		init_array_prototype_warnings();
	}
}
 
/** @returns {Text} */
export function empty() {
	return document.createTextNode('');
}
 
/**
 * @template {Node} N
 * @param {N} node
 * @returns {Node | null}
 */
/*#__NO_SIDE_EFFECTS__*/
export function child(node) {
	const child = node.firstChild;
	if (!hydrating) return child;
 
	// Child can be null if we have an element with a single child, like `<p>{text}</p>`, where `text` is empty
	if (child === null) {
		return node.appendChild(empty());
	}
 
	return hydrate_anchor(child);
}
 
/**
 * @param {DocumentFragment | import('#client').TemplateNode[]} fragment
 * @param {boolean} is_text
 * @returns {Node | null}
 */
/*#__NO_SIDE_EFFECTS__*/
export function first_child(fragment, is_text) {
	if (!hydrating) {
		// when not hydrating, `fragment` is a `DocumentFragment` (the result of calling `open_frag`)
		return /** @type {DocumentFragment} */ (fragment).firstChild;
	}
 
	// if an {expression} is empty during SSR, there might be no
	// text node to hydrate — we must therefore create one
	if (is_text && hydrate_start?.nodeType !== 3) {
		var text = empty();
		var dom = /** @type {import('#client').TemplateNode[]} */ (
			/** @type {import('#client').Effect} */ (current_effect).dom
		);
 
		dom.unshift(text);
		hydrate_start?.before(text);
 
		return text;
	}
 
	return hydrate_anchor(hydrate_start);
}
 
/**
 * @template {Node} N
 * @param {N} node
 * @param {boolean} is_text
 * @returns {Node | null}
 */
/*#__NO_SIDE_EFFECTS__*/
export function sibling(node, is_text = false) {
	const next_sibling = node.nextSibling;
 
	if (!hydrating) {
		return next_sibling;
	}
 
	// if a sibling {expression} is empty during SSR, there might be no
	// text node to hydrate — we must therefore create one
	if (is_text && next_sibling?.nodeType !== 3) {
		var text = empty();
		var dom = /** @type {import('#client').TemplateNode[]} */ (
			/** @type {import('#client').Effect} */ (current_effect).dom
		);
 
		dom.unshift(text);
		next_sibling?.before(text);
 
		return text;
	}
 
	return hydrate_anchor(/** @type {Node} */ (next_sibling));
}
 
/**
 * @template {Node} N
 * @param {N} node
 * @returns {void}
 */
export function clear_text_content(node) {
	node.textContent = '';
}
 
/** @param {string} name */
/*#__NO_SIDE_EFFECTS__*/
export function create_element(name) {
	return document.createElement(name);
}