https://webpack.js.org/api/loaders/#deprecated-context-properties

Unused

• this.value
• this.inputValue
• this._compiler
• this.resolveSync

Used

• this.options: file-loader, worker-loader, ... (Maybe undeprecate ?)
• this.minimze: sass-loader, css-loader, html-loader, ...
• this._compilation: extract-text-webpack-plugin
• this._module: file-loader
• this.exec: postcss-loader (Would be good to undeprecate :))
• this.debug: script-loader

this._compilation: worker-loader

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this._compilation.options.output.publicPath: nested-require-loader