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  <title>Lodash evaluate - if/else (Try It)</title>
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  <h1>evaluate: if/else login greeting</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var openIf = "<" + "% if (obj.loggedIn) { %" + ">";
      var nameTag = "<" + "%= obj.username %" + ">";
      var openElse = "<" + "% } else { %" + ">";
      var closeBlock = "<" + "% } %" + ">";
      var src =
        openIf + "Welcome, " + nameTag + "!" + openElse +
        "Please log in." + closeBlock;
      var render = _.template(src);
      var lines = [
        "loggedIn: true  -> " + render({ loggedIn: true, username: "John" }),
        "loggedIn: false -> " + render({ loggedIn: false })
      ];
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
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Lodash _.templateSettings.evaluate - if/else (Try It)