如何从缩小或组合的 javascript 文件中删除所有 console.log 语句

Question

我正在使用 Visual Studio

我的 javascript 代码分散在不同的文件中。

目前我正在使用以下链接的压缩器

http://yuicompressor.codeplex.com/

这会在项目构建时以组合+缩小文件的形式生成输出。

我正在寻找某种方法从我的缩小文件中的代码中删除所有 console.log 语句。 请建议我如何做到这一点。

Answer 1

为什么不这样做：

window['console'] = { log: function() {} };

当您不希望“console.log”语句执行任何操作时？

Answer 2

您可以手动使用编辑器（例如 Visual Studio）并通过搜索和替换功能使用 RegEx 来删除所有控制台日志。

使用这样的正则表达式：

console\.log(\((\").*\"\);+|\((\').*\'\);+)

您将能够使用 " 或 ' 包装字符串匹配所有 console.logs。

然后将 then 替换为 空字符串。

您必须选择 g 标志，或 GLOBAL 选项或 全部替换 按钮。

同时考虑，console对象有多种方法，如dir、table、group等...

Answer 3

这也困扰着我，因为我想为 CEO 目的优化网页，而我使用的是三个巨大的文件。我试图最小化，但文件中仍然有很多控制台语句。

所以我创建了 python 脚本，它将所有控制台语句替换为 0。 它在 three.js 上进行了测试，它的工作就像一个魅力。

• 617,8kB 三.js.min
• 580,3kB new.three.js.min

这里有一个要点...

https://gist.github.com/urosjarc/aa531af1f18c804a8dd8953190c2bef7

这是示例输出...

▶ python3 rm_console_statements.py
Enter input js file: three.min.js
Number of consoles: 424
Removed: console.warn("THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: "+r)
Removed: console.warn("THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector2: offset has been removed from .fromBufferAttribute().")
Removed: console.error("THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.")
Removed: console.warn("THREE.ImageUtils.getDataURL: Image converted to jpg for performance reasons",t)
Removed: console.warn("THREE.Texture: Unable to serialize Texture.")
Removed: console.warn("THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector4: offset has been removed from .fromBufferAttribute().")
Removed: console.warn("THREE.Quaternion: Static .slerp() has been deprecated. Use qm.slerpQuaternions( qa, qb, t ) instead.")
Removed: console.warn("THREE.Quaternion: .setFromEuler() encountered an unknown order: "+s)
Removed: console.warn("THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.")
Removed: console.warn("THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.")
Removed: console.error("THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.")
Removed: console.warn("THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.")
Removed: console.warn("THREE.Vector3: offset has been removed from .fromBufferAttribute().")
Removed: console.error("THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.")
Removed: console.error("THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.")
Removed: console.warn("THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.")
Removed: console.warn("THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.")
Removed: console.warn("THREE.Euler: .setFromRotationMatrix() encountered an unknown order: "+e)
Removed: console.error("THREE.Object3D.add: object can't be added as a child of itself.",t)
Removed: console.error("THREE.Object3D.add: object not an instance of THREE.Object3D.",t)
Removed: console.warn("THREE.Material: '"+e+"' parameter is undefined.")
Removed: console.warn("THREE."+this.type+": .shading has been removed. Use the boolean .flatShading instead.")
Removed: console.warn("THREE."+this.type+": '"+e+"' is not a property of this material.")
Removed: console.warn("THREE.Color: Alpha component of "+t+" will be ignored.")
Removed: console.warn("THREE.Color: Unknown color "+t)
Removed: console.warn("THREE.BufferAttribute.copyColorsArray(): color is undefined",i)
Removed: console.warn("THREE.BufferAttribute.copyVector2sArray(): vector is undefined",i)
Removed: console.warn("THREE.BufferAttribute.copyVector3sArray(): vector is undefined",i)
Removed: console.warn("THREE.BufferAttribute.copyVector4sArray(): vector is undefined",i)