TypeError: Cannot read property 'browsers' of undefined

[jitendravyas]

        postcss: {
            options: {
                syntax: require('postcss-scss'),
                processors: [
                    require('autoprefixer')({ add: false}),
                    require('doiuse')(),
                ]
            },
            dist: {
                src: 'app/styles/app.css'
            }
        },

Getting an error

    postcss: {
        options: {
            syntax: require('postcss-scss'),
            processors: [
                require('doiuse')(),
            ]
        },
        dist: {
            src: 'app/styles/app.css'
        }
    },

error

❯ grunt postcss Loading "Gruntfile.js" tasks...ERROR

TypeError: Cannot read property 'browsers' of undefined No "postcss" targets found. Warning: Task "postcss" failed. Use --force to continue.

Aborted due to warnings.

[ismay]

That's correct. It's because you're not passing any options. At the very least you'll need to pass an empty object if I'm not mistaken. See the readme for an example: https://github.com/anandthakker/doiuse#js

Hope that helps. For questions that aren't bug reports or feature requests I'd recommend stack overflow, as that's more useful for support requests.