str/startsWith

Test whether a string starts with a given prefix

const app = mvfm(prelude);
const prog = app({ s: "string" }, ($) => {
  return $.startsWith($.input.s, "http");
});
await fold(defaults(app), injectInput(prog, { s: "https://example.com" }));

const app = mvfm(prelude);
const prog = app({ s: "string" }, ($) => {
  return $.startsWith($.input.s, "http");
});
await fold(defaults(app), injectInput(prog, { s: "https://example.com" }));

const app = mvfm(prelude);
const prog = app({ s: "string" }, ($) => {
  return $.startsWith($.input.s, "http");
});
await fold(defaults(app), injectInput(prog, { s: "https://example.com" }));

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