rollup-plugin-insert/lib/es2015.js

string mutation plugin for Rollup

import { createFilter } from 'rollup-pluginutils';
import MagicString from 'magic-string';

const transform = (insert, options = {}) => {
    const filter = createFilter(options.include, options.exclude);
    const sourceMap = options.sourceMap !== false;
    return {
        name: 'insert',
        transform(code, id) {
            if (!filter(id))
                return;
            let magicString = new MagicString(code);
            const output = insert(magicString, code, id);
            if (typeof output === 'string') {
                magicString.overwrite(0, code.length, output);
            }
            else if (output instanceof MagicString) {
                magicString = output;
                // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
            }
            else if (output != null) {
                let received;
                try {
                    received = JSON.stringify(output);
                }
                catch (_a) {
                    /* istanbul ignore next */
                    received = String(output);
                }
                throw new TypeError(`The output content should be an instance of string or MagicString, but received: ${received}`);
            }
            return {
                code: magicString.toString(),
                map: sourceMap ? magicString.generateMap() : undefined,
            };
        },
    };
};
const append = (append, options) => transform((magicString) => magicString.append(append), options);
const prepend = (prepend, options) => transform((magicString) => magicString.prepend(prepend), options);
const wrap = (begin, end, options) => transform((magicString) => magicString.prepend(begin).append(end), options);
var index = {
    transform,
    append,
    prepend,
    wrap,
};

export default index;
export { append, prepend, transform, wrap };