<form onSubmit={ this.handleSubmit }>
    <label>title</label>
    <input type="text" id="title" onChange={ this.handleChangeTitle } value={this.state.title}/>
    <label>body</label>
    <input type="text" id="body"  onChange={ this.handleChangeBody } value={this.state.body}/>
    <input type="submit" value="add" />
</form>