File: style-map.js

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import{noChange as t}from'../lit-html.js';import{directive as e,Directive as r,PartType as s}from'../directive.js';
/**
 * @license
 * Copyright 2018 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */const n="important",i=" !"+n,o=e(class extends r{constructor(t){if(super(t),t.type!==s.ATTRIBUTE||"style"!==t.name||t.strings?.length>2)throw Error("The `styleMap` directive must be used in the `style` attribute and must be the only part in the attribute.")}render(t){return Object.keys(t).reduce(((e,r)=>{const s=t[r];return null==s?e:e+`${r=r.includes("-")?r:r.replace(/(?:^(webkit|moz|ms|o)|)(?=[A-Z])/g,"-$&").toLowerCase()}:${s};`}),"")}update(e,[r]){const{style:s}=e.element;if(void 0===this.ut)return this.ut=new Set(Object.keys(r)),this.render(r);for(const t of this.ut)null==r[t]&&(this.ut.delete(t),t.includes("-")?s.removeProperty(t):s[t]=null);for(const t in r){const e=r[t];if(null!=e){this.ut.add(t);const r="string"==typeof e&&e.endsWith(i);t.includes("-")||r?s.setProperty(t,r?e.slice(0,-11):e,r?n:""):s[t]=e}}return t}});export{o as styleMap};
//# sourceMappingURL=style-map.js.map