text: //// [equalityStrictNulls.ts]
  
  function f1(x: string) {
      if (x == undefined) {
      }
      if (x != undefined) {
      }
      if (x === undefined) {
      }
      if (x !== undefined) {
      }
      if (x == null) {
      }
      if (x != null) {
      }
      if (x === null) {
      }
      if (x !== null) {
      }
      if (undefined == x) {
      }
      if (undefined != x) {
      }
      if (undefined === x) {
      }
      if (undefined !== x) {
      }
      if (null == x) {
      }
      if (null != x) {
      }
      if (null === x) {
      }
      if (null !== x) {
      }
  }
  
  function f2() {
      if (undefined == undefined) {
      }
      if (undefined == null) {
      }
      if (null == undefined) {
      }
      if (null == null) {
      }
  }
  
  function f3(a: number, b: boolean, c: { x: number }, d: number | string) {
      if (a == null) {
      }
      if (b == null) {
      }
      if (c == null) {
      }
      if (d == null) {
      }
  }
  
  function f4(x: number) {
      if (x > undefined) {
      }
      if (x < undefined) {
      }
      if (x >= undefined) {
      }
      if (x <= undefined) {
      }
  }
  function f5(x: string) {
      switch(x) {
          case null:
              break;
          case undefined:
              break;
          default:
              return;
      }
  }
  
  
  //// [equalityStrictNulls.js]
  function f1(x) {
      if (x == undefined) {
      }
      if (x != undefined) {
      }
      if (x === undefined) {
      }
      if (x !== undefined) {
      }
      if (x == null) {
      }
      if (x != null) {
      }
      if (x === null) {
      }
      if (x !== null) {
      }
      if (undefined == x) {
      }
      if (undefined != x) {
      }
      if (undefined === x) {
      }
      if (undefined !== x) {
      }
      if (null == x) {
      }
      if (null != x) {
      }
      if (null === x) {
      }
      if (null !== x) {
      }
  }
  function f2() {
      if (undefined == undefined) {
      }
      if (undefined == null) {
      }
      if (null == undefined) {
      }
      if (null == null) {
      }
  }
  function f3(a, b, c, d) {
      if (a == null) {
      }
      if (b == null) {
      }
      if (c == null) {
      }
      if (d == null) {
      }
  }
  function f4(x) {
      if (x > undefined) {
      }
      if (x < undefined) {
      }
      if (x >= undefined) {
      }
      if (x <= undefined) {
      }
  }
  function f5(x) {
      switch (x) {
          case null:
              break;
          case undefined:
              break;
          default:
              return;
      }
  }
  