What is lazy evaluation in javascript

If in a continuous logical operation, the operation result is already clear before the last operation is completed, then the operation often does not need to continue to be executed, because it will not have any impact on the final result. Influence.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Definition

If in a continuous logical operation, the operation result is already clear before the last operation is completed, then the operation often does not need to continue to be executed, because it has already been There will be no impact on the final result.

Example

true || “cat” Result: true

true && “cat” Result: cat

true && “cat” || true Result: true

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