This repository has been archived on 2024-07-27. You can view files and clone it, but cannot push or open issues or pull requests.
keksAccountGUI/node_modulesOLD/vuetify/lib/util/mergeData.js
2019-08-11 20:48:02 +02:00

110 lines
No EOL
3.2 KiB
JavaScript

/**
* @copyright 2017 Alex Regan
* @license MIT
* @see https://github.com/alexsasharegan/vue-functional-data-merge
*/
export default function mergeData() {
const mergeTarget = {};
let i = arguments.length;
let prop;
let event; // Allow for variadic argument length.
while (i--) {
// Iterate through the data properties and execute merge strategies
// Object.keys eliminates need for hasOwnProperty call
for (prop of Object.keys(arguments[i])) {
switch (prop) {
// Array merge strategy (array concatenation)
case 'class':
case 'style':
case 'directives':
if (!Array.isArray(mergeTarget[prop])) {
mergeTarget[prop] = [];
} // Repackaging in an array allows Vue runtime
// to merge class/style bindings regardless of type.
mergeTarget[prop] = mergeTarget[prop].concat(arguments[i][prop]);
break;
// Space delimited string concatenation strategy
case 'staticClass':
if (!arguments[i][prop]) {
break;
}
if (mergeTarget[prop] === undefined) {
mergeTarget[prop] = '';
}
if (mergeTarget[prop]) {
// Not an empty string, so concatenate
mergeTarget[prop] += ' ';
}
mergeTarget[prop] += arguments[i][prop].trim();
break;
// Object, the properties of which to merge via array merge strategy (array concatenation).
// Callback merge strategy merges callbacks to the beginning of the array,
// so that the last defined callback will be invoked first.
// This is done since to mimic how Object.assign merging
// uses the last given value to assign.
case 'on':
case 'nativeOn':
if (!mergeTarget[prop]) {
mergeTarget[prop] = {};
}
const listeners = mergeTarget[prop];
for (event of Object.keys(arguments[i][prop] || {})) {
// Concat function to array of functions if callback present.
if (listeners[event]) {
// Insert current iteration data in beginning of merged array.
listeners[event] = Array().concat( // eslint-disable-line
listeners[event], arguments[i][prop][event]);
} else {
// Straight assign.
listeners[event] = arguments[i][prop][event];
}
}
break;
// Object merge strategy
case 'attrs':
case 'props':
case 'domProps':
case 'scopedSlots':
case 'staticStyle':
case 'hook':
case 'transition':
if (!mergeTarget[prop]) {
mergeTarget[prop] = {};
}
mergeTarget[prop] = { ...arguments[i][prop],
...mergeTarget[prop]
};
break;
// Reassignment strategy (no merge)
case 'slot':
case 'key':
case 'ref':
case 'tag':
case 'show':
case 'keepAlive':
default:
if (!mergeTarget[prop]) {
mergeTarget[prop] = arguments[i][prop];
}
}
}
}
return mergeTarget;
}
//# sourceMappingURL=mergeData.js.map