3 examples of 'typescript inline if' in JavaScript

141
export function inlineIf(_vm: VM, { positional }: Arguments) {
142
  assert(
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    'The inline form of the `if` helper expects two or three arguments, e.g. ' +
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      '`{{if trialExpired "Expired" expiryDate}}`.',
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    positional.length === 3 || positional.length === 2
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  );
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  return ConditionalHelperReference.create(positional.at(0), positional.at(1), positional.at(2));
148
}

240
function applyInlineIf(
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    element: IRElement,
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    babelNode: t.Expression,
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    testExpression?: t.Expression,
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    falseValue: t.Expression = t.nullLiteral()
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): t.Expression {
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    if (!element.if) {
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        return babelNode;
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    }
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250
    if (!testExpression) {
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        testExpression = bindExpression(element.if!, element).expression;
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    }
253
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    let leftExpression: t.Expression;
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    const modifier = element.ifModifier!;
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    if (modifier === 'true') {
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        leftExpression = testExpression;
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    } else if (modifier === 'false') {
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        leftExpression = t.unaryExpression('!', testExpression);
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    } else if (modifier === 'strict-true') {
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        leftExpression = t.binaryExpression('===', testExpression, t.booleanLiteral(true));
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    } else {
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        throw generateCompilerError(TemplateErrors.UNKNOWN_IF_MODIFIER, {
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            messageArgs: [modifier],
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        });
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    }
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    return t.conditionalExpression(leftExpression, babelNode, falseValue);
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}

48
inline() {
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    return this.tag.namespace === 'inline';
50
}